No fuel injection pulse. I have a 2003 F250 XL Super Cab 5.

No fuel injection pulse I even made an injector tester all of the injectors cycle. Cars & Trucks; All Recent; Join If you have throttle body injection/tbi can you see fuel injector pulse, both fuel injectors, if you have two. Have tried unplugging the fuel injectors one by one when the car is in no start mood but makes no difference unfortunately. I got fuel injection pulse, good fuel pressure with the return line pinched off and spark, I don't know where to go next. 9l. The injectors have power when checked between They we're able to manually get spark and injector pulse by pulsing them with equipment they have. Always #2 cylinder. 61 posts · Joined 2023 Add to quote; Only show this user #1 · Apr 19, 2024 (Edited My mechanic and I spent most of a day searching for the fault that stopped my 1993 5SFE Camry while it was running. I have the same system in my 55 pro street. suspect contaminated fuel caused injectors to get plugged. 7L engines and this article will help you with both types. See more car engine pictures. This time it's a black 1984 xj-s V12 with biscuit interior. After reading and digging, the way I understand it is the injection system works like this: The injector pulses actually come from the Fuel Injection Control Module (FICM) located on top of the passenger side valve cover on my '02. No pulse at injectors! My 95 Bronco (5. If I bypass the fuel pump relay I get constant fuel flow but no spark or pulse. could lead you closer to the problem. 2002 VW GTI with CRANK but NO SPARK, NO FUEL INJECTION FIRING with CEL Help us help you. So we sent the ECM out to be rebuiltonly to find out it was from a 92 Comanche. I have replaced the fuel filter and the battery to try to resolve the problem with no Common Causes of No Fuel Injector Pulse 1. will need injectors & fuel tank dropped & cleaned and new fuel. 2. Using a noid light I get no pulse on fuel injectors. Car has great spark, if I spray starting fluid in the intake it fires immediately. Now won't start on it's own at all without starting fluid. It started with a spray of fuel to the air intake then stopped straight away. I've got power to the injectors. 5 Posts. 0l 302cid EFI. Last weekend I reassembled it, installed a new battery and expected to go for a ride. Good bit of knowledge on later model vehicles. 99v. Exactly the same problem. At first, the breaker contact signal was hooked up to the positive side of the coil but I fixed that problem and it is now on the negative side where it should be. Any ideas? Thanks so much If there is power at the injector connector’s negative terminal, there might be an issue with the injector driver circuit or one of the fuel injection system’s other electrical components. 5 volts. 1,2 In diesel engines, advanced fuel injection Turned ignition key on, fuel pump runs, voltage to fuel injectors, just no fuel. For some reason, the ECU isn't grounding them. Still wont start. never ran again. The FICM is basically just a set of high power transistors (8 of them) that create the injector pulses. 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - 1986 F150 No Injector Pulse - Im starting to feel like a broken record here, :-blah, but I've got yet another question about my 1986 F-150 5. With a noid light plugged into the connector and the engine running, the light will blink for a few seconds then stop. 0L, 5. I could be wrong, of course, and we may come back around to the no comm, but my first instinct would be to skip the scanner and stay under the hood. when we tried to diagnose the problem we checked for spark by removing leads and there was spark, the fuel pump was running, could here it in the boot, Vs clubsport no spark no injector pulse. C4 Tech/Performance - Help the 87 Start-No fuel injector pulse and VATS delete - Im making a custom project out of an 87 so things arent exactly stock, but should be close. I have fuel pressure at the rails. So I've finally solved the problems in my other three posts (well mostly) and now I'm at the last C4 Tech/Performance - Help the 87 Start-No fuel injector pulse and VATS delete - Im making a custom project out of an 87 so things arent exactly stock, but should be close. This is a conversion in a Mazda Bravo so has the ECU BCM disabled with a chip. has rpm signal checkfuel injector flow-very weak. then one day it sputtered and stumbled up the driveway and shut off. I have a few problems. It has spark but no pulse to the injectors. Maybe bad circuit-opening relay. car has been sitting awhile (3 or 4 yrs) got it to a local shop who got into it and said no fuel pressure and the float is stuck (or something like that ) so had both those replaced. One of those times I had it towed after an hour of no luck, but of course it fired up when I got it back to the garage. wiring Turned ignition key on, fuel pump runs, voltage to fuel injectors, just no fuel. Faulty injector driver: The injector driver module, responsible for supplying the electrical pulses, may be malfunctioning. Desired and actual ICP 1450 psi, verified cam and crank signals to FICM, 11 gps Incorrect , this indicates either a faulty crank sensor or faulty cam sensor they must be in sync otherwise the fuel I'm sure this has been covered, and I have read the posts on it, but still need some feedback. ) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a I noticed the fuel guage was empty so we filled ot up. You can also look at the engine RPM and check that it matches with the fuel injection pulse width. Make a note of all readings and compare them to the manufacturer’s specifications to determine if there’s an issue. It has 12v constant but it's not getting any ground pulse from ECM to the blue wire. The value displayed by this parameter is large, which means that each time the injector is opened for Question - Non start issue, no injector pulse it a ford ranger 2. replace computer and still I have no fuel injector pulse. Still will not fire except with Ether. com are evident, only the codes that are to be expected were revealed with the KOEO test, Fuel Pressure is 40#, 12V on one side of each injector no ground pulse to any Just installed my new FiTech on a LS3 with a GPI SS4 cam, Did the initial setup selecting x58 and sending everything to the ECU and im not getting any spark and seem the injectors are not firing either. Were is the FI injection pulse location located Injector pulse width is the amount of time, measured in milliseconds (ms), that a fuel injector stays open (delivers fuel) during a cylinder intake cycle. changed wiring harness, good fuel pressure to injectors still no pulse, Help Please thanks in advance I have no injector pulse and truck will not start. Explorer, Sport Trac, Mountaineer & Aviator - no injector pulse - got gas, got fuel pressure, got a good battery, got 12v to the injectors, engine fires immediately with a shot of ether in the intake and then dies just as quick, Fuel Injection, Carburetion & Fuel System. Just wrapped up shotgunning my 1985 240 fuel system, pretty much everything is new right up to the injector rail. I thought i could back feed fuel through test port via pressure tank contraption that i made but im not 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - 1986 F150 No Injector Pulse - Im starting to feel like a broken record here, :-blah, but I've got yet another question about my 1986 F-150 5. Then, with key ON, throttle at idle position, the injectors would spray like the throttle was at wide open. I then replaced pump and pump relay. New Cam sensor and it was doing this before the replacement! Starts up runs well until it gets warm then the pulse goes intermittent. All compression-ignition engines (e. Zhou et al. 1997, 58, f150, ford, injector, pulse 1987 - 1996 F150 & Larger F-Series Trucks - 87 ford f150 no injector pulse - I have an 87 4x4 4speed 300 with good spark, and no injector pulse, fuel pumps will not turn on from the computer, it sends no ground signal to trigger the F/P relay, this is a problem that is driving me crazy! I have replaced a computer that Explorer, Sport Trac, Mountaineer & Aviator - no injector pulse - got gas, got fuel pressure, got a good battery, got 12v to the injectors, engine fires immediately with a shot of ether in the intake and then dies just as quick, Fuel Injection, Carburetion & Fuel System. Decided that a TBI cleaning was in order, so sprayed some carb/injector cleaner with it Its the last thing in the fuel side of things i have no replaced since i bought the car months ago. - fuel pump cycles at key to run then shuts off- fuel pump runs at engine No spark Ultimate LS 70004 - No spark Ultimate LS 70004 - Electronic fuel I'm getting fuel to the rail just no pulse by the injectors. Hi all, As above has spark no injectors. since the power come in and goes out to start the injector relay. Ive done my homework but here is where I'm at currently: I have a VATS delete chip from PCM of NC, new injectors, 42 lb of fuel pressure at the I can say that it runs and stalls on the cold start but I still have no injector pulse. It sounds like you are getting If the fuel pressure slowly rose, it's a weak fuel pump / restricted fuel filter. There are two types of the ‘Spider’ fuel injector assemblies used on the GM 4. 8) has an ongoing intermittent (ghost) problem. In this video I explain the common reason why your engine won't start caused by no injector pulse. howtoautomotive. The thing wont restart now! Ive got a fully charged battery and a jumper on it, it just cranks and cranks. But the problem lies furrer up stream somewhere. wondering if any body has had similar faults? Therefore there's no injection pulse. 3K views 2 replies 3 participants last post by whynotthinkwhynot Oct 21, 2016. 1989 240 b230f+t. 2- positive voltage is present at the injector plug. CRAZY)_YANKEE626 MEMBER; 1989 A fuel injector is responsible for allowing fuel into the engine and is controlled by the PCM as part of the fuel injection system. We'll hope the fix is somewhere besides that. Service engine light now comes on after many To enhance the operating performance of the axial field flux-switching permanent magnet motor (AFFSPMM) at low speeds and minimize the rotor position inaccuracies Injector pulse is a critical aspect of the proper functioning of an engine. Here is an overview of the car. If I use starting fluid the truck starts and the injectors work great. Not sure where to look from here. did all the stupid tests first. I ran the codes and they indicate no fau Charged battery but no start. Tried to get ecu repaired. If no voltage is present, disconnect the fuel pump relay, and connect an ohmmeter between the F17 (terminal 86) and 11 (terminal 85) of the fuel pump relay and check for continuity. im just now finishing my engine build so now im tryin to get it started the previous owner of the car had it carburated so he ripped out the wiring harness so when i got it i put a computer and wiring harness back in and i went to try and start it and my fuel pump wouldnt turn and i had no spark so i hot wired my fuel pump to a switch real fast just to see if it Crank, no start. Here is what I have done so far New ignition electrical switch New lock cylinder w/anti theft (2 of them) The PCM is responsible for maintaining proper spark and fuel injection timing for I ended up replacing the EZK module in my '88 Turbo, and I finally have spark and the fuel pump engages when it's supposed to. Getting 12v to both wires at injector, traced the 2 wires (responsible for puls to injectors, 4 each) back to ecm and checked for pulse closer to ecm and still nothing. pull fuel-rail and test for fuel coming from injectors when cranking 2. Ford Truck Enthusiasts Community Navigation. I hooked up a fuel pressure gage and it is perfect. That was my issue with no pulse last year. I have checked all ECU voltages and they check out ok at the terminals. Just because, removed several injectors and can get them to "click" and pass fuel when jumping directly to battery. I used a body harness from a 78' and the injection harness from a 77. By chatting and providing personal info, They've checked the fuel line and there's no sign of damage or corrosion. LH 2. Steve hsv; Feb 9, 2024; VR - VS Holden Commodore (1993 - 1997) Replies 7 Views 670. Your fuel injectors have tiny orifices in them to Vt V6 no injector pulse has spark. I have swapped out crank & cam sensors, icm, pcm, map sensor, throttle and mass air sensors, fuel pump. all 4 barrels are completely dry. No pulse on the fuel injectors. fuel flow - return line flows fuel if disconnected and pump is priming. If no fuel pump activation, check the circuit and fuel pump. Question, how are you getting good oil pressure, have fuel pressure? For 2006 and newer engines, at key ON and engine OFF, fuel rail pressure will be close to 0. c) run a jumper wire fuel pump relay XX position from 30 to 87 position. Or I would re i have no fuel to the injectors, plenty of fuel to the ip. Fuel pressure will hold steady at 55 PSI. The exception would be When I try and start my 93 Chevy Cheyenne k3500 no fuel come out of the injectors. 2009 420 ES - Crank no start, fuel injection Jump to Latest 20K views 10 replies 3 participants last post by tweak1029 Jun 4, 2016 LH 2. Hello Is you issues resolved? I have the same identical problem with no spark on my 87 GrandNational. Without it, fuel will not be properly delivered to combustion chambers, and your vehicle will not start or run efficiently. i have an electric pump and when u pull the return line from the ip. Will not illuminate the noid light. Related Fuel Injector Replace/Remove Direct injection of liquid fuel inside the combustion chamber has allowed significant improvement of indicated efficiency in both diesel engines and, recently, also spark ignition engines, thanks to its ability to generate nearly If I come back to the car after a few hours it starts up fine again. I have replaced Ecm ,crank sensors, cam sensor 2 Auto Zone modules and coil pack , check all fuses . Checking wires now. Turned out to be my Tbelt slipped. 4L) - No pulse at injector - Hi guys, I have a 2006 F150 with the 5. 3- replaced camshaft sensor and both crankshaft sensors. Fuel pressure supplied by the fuel pump No Voltage At I just bought my first RZR, it is a 2015 RZR s 900. He said that it could be due to a bad ECM, problem in the wiring somewhere, or something else. 0 - Fix for ECU not sending injector pulses. 1989 Chevy Camaro no Pulse to fuel injectors. Now injectors seem to be non functional. Grounds on these cars are a problem, so you need to find and clean all, if you haven't already. The car was in such shambles from the interior to the paint to the electrics that I tore it down pretty extensively. No Injector Pulse - What to Check? Jump to Latest Amazon. Decided that a TBI cleaning was in order, so sprayed some carb/injector cleaner with it - Verified that injectors will pulse and spray fuel when ground is added. The numerical unit of the fuel injection pulse width displayed by this parameter isms. Purchased and installed 70004. Check for pulse at the ECU, check all of the injectors and not just one. LB7, LLY, 01-04 At key ON, engine OFF, fuel rail pressure should be 1. Tested fuel pressure and it was a measly 10 psi after priming pump a few times. If it is not, DTC P0191 may set. If fuel is being injected into the combustion chamber, some fuel will be blown out the tail pipe. Place car in neutral or Park and set the parking brake. It sat for a long time . First try or two - NO CLICK, then a TINY CLICK which grew stronger and stronger. 0 1994 Jeep Cherokee,No fuel injector pulse, 40 lbs fuel pressure at the fuel rail, changed crankshaft position indicator, PCM is tested good, There A fuel injector is responsible for allowing fuel into the engine and is controlled by the PCM as part of the fuel injection system. Post by series8rx7 » Fri Jul 05, 2019 2:55 am. I have done a lot of troubleshooting with no results, I called Fitech and got no response back. 2 740 Turbo No Injector Pulse/Ground. Modular V8 (4. com: OTC 7602 GM Port Fuel Injection (PFI) Noid Light: Automotive: Reviews, Prices & more Any parts place will have it . I have spark, but now we have finally discovered I am not getting any fuel into the cylinders. Been hard to diagnose because it fires up after about 15 minutes. - Swapped ignition module with known good unit, no change. 2 - . 5. Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos. biscuitsngravey Discussion starter. No fault There are a ton of possibilities why there would be no pulse at the injectors. it runs if i spray directly into intake. It just died on me one day and come to find out its not getting fuel. The problem I am having is no pulse to the left injector, as I confirmed with a noid light. If voltage does not drop, proceed to step 5. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. I see that a lot of people have issues with the Injection Pulse. No fuel pressure, check for 12 volts at the fuel pump relay on the tan/white tracer wire or Brian Eslick from How to Automotive http://www. These HP CR diesels have delicate injection pumps, and they fail catastrophically sending shrapnel throughout the fuel system and contaminating everything. Use the metal cased ones, I've had poor luck with generic plastic shelled EFI relays. So I've finally solved the problems in my other three posts (well mostly) and now I'm at the last No injector pulse. Ive already put a new cam sensor on and swapped with a running ecu/key from my RXT. But the bike would not Car just shut off on the freeway. Install fuel meter cover. have good spark on driver side. I finally just checked the pulse to it today using a noid light and nothing is there. I replaced ECM also. I just did a Malibu not too long ago with a similar issue and it cranked, no injector pulse, and once I hit it with some gas it ran fine. The car will crank over fine, it sound like there is either no spark for no fuel getting to the motor. From Russia with love[/B] ASE master tech 89 gmc 4x4 2500 sub. Has died a couple times while driving, but mostly runs fine and then won't start one turned off. Main ecu relay ok. 7 TBI. 2003 Cobra - 2. MAP, fuel cut rev limit, etc. Carburetors If you get no injector pulse while cranking, it could be a faulty camshaft position sensor, broken wiring, bad ground connections, a faulty ECU, or even blown injector fuses, but not that many cars have those. Spark test - pass, Fuel pressure near 50 psi at intake, basic NOID test, failed. Tore-up everything else before that, though, In the last 12 hours: (1) NEW ECM (2) new TFI Modules, (1) wells, (1) BWD (3) Reman distributors Still No injector pulse. No fuel injection pulse dohc. I checked and it has good fuel pressure in the lines, I change the injector and it didn't help, put a new fuel filter in, I made sure the battery has a good charge. All the exterior thank you for watching!!!!!If this video was helpful to you and if you would like to place a donation, here is my Venmo and PayPal information. 7. Courtesy of Redrose "86 and up ecm puts out a 5v signal that must be go to "sink" (ground) at 30 Hz before fuel (injectors) Shashank DS wrote: ↑Mon Feb 04, 2019 6:49 amThe pulse is exactly at the center of the missing tooth waveform. 4L engine. has 60 psi fuel pressure has pulse to injectors. plain Here's a white board presention about fuel injector drivers reinforcing the point made by @plain OM in post #19 ; it unfortuntely isn't in English but (guessing here) Arabic. A cutaway model of a petrol direct-injected engine. no it doesnt. Fuel pressure supplied by the fuel pump 1989 Chevy Camaro Car Wont Pass Gas To Fuel Filter. if #1 NO and #2 NO, test crank and cam-sensors with oscilloscope. e. 0 Powerstroke. com/ takes you step-by-step through the process of diagnosing a no start condition on a Lexus This article will provide an in-depth, step-by-step guide to checking injector pulse, including what tools are required, how to locate the injectors, what readings indicate proper Make sure your battery is fully charged. Got it to fire but only for 10 to 20 seconds most of the injectors were leaking and needed to be replaced. No +2. Cam sensor ok. The fuel pressure for tbi is around 9--13 psi, So i'm just trying to star my sr, the engine crank, the fuel pump work, but got no i'm wondering if there are relays for the ignion and injection?? Any help will be apreciate:mrgreen: thanks. I installed system myself. I'm pretty sure its an electrical problem just wanted to see if anyone had some other ideas before I start tracing and probing. no change, replaced fuel punmp,. Checking the injector pulse is a 900xp no fuel pulse/intermittent/weird. 5- the computer communicates with a scanner but shows no codes present. Just check fuel pump pressure just after pump and pegged my 15lb. 3. Jun No start TPI L98 350- verifying fuel pressure, fuel injectors, and spark plugs. I have power (+) but no pulse or random pulse (-) at the injector. There is a fuel injection relay that requires a three-wire jumper. Injectors are electronically controlled valves specialized for supplying fuel to cars. 0L, No Injector Pulse - I'm working on a buddies truck that won't start. Desired and actual ICP 1450 psi, verified cam and crank signals to FICM, 11 gps Incorrect , this indicates either a faulty crank sensor or faulty cam sensor they must be in sync otherwise the fuel injection control module will not fire. It is strange that one shorted fuel injector can cause all the other injectors to not fire, but this is exactly what can happen with a group fired system. Car will start on fluid, but quickly dies. You could actually remove the computer and still start the engine provided you give some fuel to ignite. After relearning key it started and ran No injector pulse 2006 6. fuel pump runs and primes, fuel pressure at rail. So, the most likely cause is that the fuel injectors, are probably not opening. Also, I do not know if If voltage drops fuel pump relay is functioning, and no further testing of the fuel pump relay is necessary. Have had problems with 2 new CAM sensors . Fuel pressure ok. Click for thumbs down. Watch this as you crank. If this is good, then the issue is a bad ECM. I just knew it was the ECM and I changed it with a good used one. 7 from a 1988 c1500. "SYSTEM DESCRIPTION The amount of fuel injected from the fuel injector is determined by the ECM. All the powers and grounds listed on FordFuelInjection. From what I know about yotas fuel injection 84 basterd year, 85-86 same, 87-88 same, and hae somebody crank the motor to check for pulse. 0 Click for thumbs up. 0. B. I have a 2008 can-am outlander 800 and the injectors want pulse. HELP!!!!! Hello,I would appreciate any input on my no spark issue. I get spark at plugs but no pulse to the injector therefore no fuel and no start. - Verified that all ECM grounds are good. 9 L Fuel injectors dont pulse - Truck will not run, fire on both sides of wires. wondering if any body has had similar faults? A typical electronic fuel injector. unable to pull any codes from the truck because its been out of commision for quite some time. NRMA guy told me it was probably the crank angle sensor so I replaced it but still no start. Site Announcements; New Member Introductions; Fuel Injection, Carburetion & Fuel System. The issue is there is no pulse or juice to the injectors. 4- the car momentarily runs while spraying starting fluid. I am reading rpm's during cranking on the scanner. Driving Project. Checked codes and got crank cam and O2 sensor. 8 MegaPascals (MPa), or 160 to 261 pounds per square inch It will crank over fine but not start. They said it was a computer issue. 71blazer2wd @71blazer2wd. My Car Wont Pass Gas fuel pressure - goes to 60ish psi when fuel pump is priming, than gets to 20psi after 10-15 seconds slowly. - Verified that injector wires and ignition module wires all have continuity to ECM. Replaced relays with new old stock Bosch 0 332 014 112 after noting they did not click occasionally. check spark-ok. The 25A fuse The fuel injection pulse width is the length of time that the engine microcomputer controls each fuel injection, and it is the most important indicator of whether the fuel injector is working normally. We put the ECM back in and still no spark. It is strange that one shorted fuel injector can cause all the If you have no PCM pulsing to the coil or injector and the wire is intact, then the PCM output for that line may have been blown. truck stalled in parking lot,towed home,replaced crank sensor,ignition control module,and passanger side coil pack. Some of the common causes are faulty crankshaft position sensor, bad harmonic Diagnosing and resolving a no fuel injector pulse issue requires a methodical approach, considering both electrical and mechanical factors. Im stuck now, i cant figure out what to do next. So here is what is going New install, No fuel issue - New install, No fuel issue - Electronic fuel injection tuning for automotive applications. If you see no RPM while cranking, there's no crank sensor input. 5 and 3. Side note I'm not too confident the company properly checked the computer. You can also look for a pulse at the coil. I put a 77 280z together and have some questions as to why I dont have an injection pulse. It turns over fine, has good compression, it is firing the spark plugs, the engine will run as you spray fuel in throttle body. diesel engines), and many spark-ignition engines (i. I have no injector pulse and no power to injectors on the Terminator EFI. Make sure and log the GPW sensor. i am told it should be a steady stream comming out of the pump , if i remove the return line from 2004 - 2008 Ford F150 - 2005 f150 injectors not pulsing - I have a 2005 F1 50 King Ranch. New wires, plugs, cap, rotor, fuel filter,etc have spark, have fuel at the back of the tbi. Blown Fuse and Relays The ECU cannot pulse the injector without an Ne signal and will not start or run if this signal is not present. Customer. All sensors test good, replaced ECM, no fuel leaks, have desired bar pressure, injection pump is primed and stays primed. The fuel pump is good. tried good fuel-no change. Bought a 95 OBS Single Cab Fleetside Silverado with the 5. An easy test is to put the positive volt meter probe lead on LH connector postion 13. In trying to keep up with emissions and fuel efficiency laws, the fuel system used in modern cars has changed a lot over the years. 91 replacement motor rebuilt and new cam. I recently changed out both cam phasers and afternoon so the truck ran smoother and quieter than ever before. For shits and giggles i changed the crank sensor anyway and it still wont start . Borrowed a noid light, got no pulse. Had second hand full ecu, cas, and key fitted and coded to rest of car. I pulled a spark plug and confirmed there's no spark. Now car will crank but not start. Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of a fuel injector. Jump to Latest 5. 1 month later im still waiting for these parts. I due have spark though and fuel pressure also I can make it run on carb 1991 ranger 2. I can't get the injector to spray fuel. There are three main causes of this problem and we will look at each one separately. I do have fuel pressure. C4 Tech/Performance - 85 vette no injector pulse HELP! - I purchased an 85 Corvette Z 51 with the 4+3 trans. g. looking at the schematics, well the PCM controls the pulse width to the injectors , If you have good fuel pressure but no signal to the injector(s) the ECM is probably the problem The current problem I am trying to resolve is no injector pulse. jumper B+ and FP to manually turn ON fuel-pump, crank engine, do you get fuel from injectors? 3. Injectors have battery B+ on all the pink wires. Question type: Maintenance & Repair. 1987 - 1996 F150 & Larger F-Series Trucks - 5. causes, injection dead ( but PCM fires them with electrical pulse) top cause fuel pressure not to spec, steady power to injectors. 1987 - 1996 F150 & Larger F-Series Trucks - No injector pulse - No start due to fuel delivery issues. The fuel pressure was not holding for more than ok its a '97 Gp 3800 non sc. Maf sensor ok. ) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a Greg Banish, Calibrated Success Before we ever begin tuning our delivered air to fuel ratio in the engine, we have to make some decisions about fuel delivery and calibration. If there's no signal (lighting of the noid light) at the injector plug (s), I would say you have a harness wiring problem. Jump to Latest 21 - 40 of 43 Posts. 1992 c1500 5. Injectors have power but no ground pulse. (Electrical terminals of the injector should be parallel with throttle shaft). 1 to 1. 2–5 HCCI is usually associated with higher hydrocarbon (HC) and CO emissions, which can be mitigated using different multi-pulse injection strategies, where the diesel fuel is directly injected several times over a single cycle. I've tried everything. Replaced crank positioning sensor and computer. I have a 2003 F250 XL Super Cab 5. 4. 4 RWD A/T. (Sometimes more sometimes less) This has happened eight times. At this point i know it's fuel delivery so i test the fuel injectors then plug in a multi-meter set to dc voltage . Should be around 5. HCCI is able to achieve high thermal efficiencies as well as reduce NO x and soot emissions. A good way to verify fuel injection is to watch the tail pipe while the engine is being cranked. Our last ditch effort was to disable the security system. Check for Blown Fuses or a Broken Wire. both wires on each injector will be hot's then one hot changes to ground intermittantly to create a ‘Spider’ Fuel Injection Basics. The findings indicated that the pilot hydrogen fuel pulse injection facilitated ignition and stable combustion of kerosene. Installed a new one, went to crank it and no firing up. no change. Top. After relearning key it started and ran No fuel at the throttle body, I did not diagnose the problem, just swapped fuel pumps. Replaced the crank sensor and the engine control relay with an OEX unit from Ashdown's. Open or shorted injector circuit: A break in the wiring or a short circuit can prevent the injector from receiving power. Wednesday, October 24th, 2007 AT 5:21 AM Please login or register to post a reply. I when we tried to diagnose the problem we checked for spark by removing leads and there was spark, the fuel pump was running, could here it in the boot, Vs clubsport no spark no injector pulse. no pulse to tbi 1995 393 chevy suburban stopped suddenly, have replaced fuel pump, computer, injectors, tps, and iac, nothing fixes it. I'm working on my son's 91 S15 with the tech 4 in it. I have fuel coming to my fuel rail I Have battery B+ at all pink fuel injector wires, BUT am not getting the "pulse" signal (B-) from the PCM. If no 12V, repair that circuit. Modern fuel injectors were invented to make the combustion process more efficient. Your saying if the distributor is off I won't get any injector pulse when everything else tests good. 3 Whipple, Return style fuel system, dual Walbro GSS342 pumps, Aeromotive FPR, SCT BA3000 MAF, Accufab TB, SRA conversion, 604 rwhp, 581 rwtq Hey Holmes! My initial thought is that the no communication issue is NOT related to the no start, since you observed spark/injection pulse/fuel pump operation. We have proved the fuel pump is ok by powering it with jumper wires. The typical injector pulse width for an idling engine at normal operating temperature is between 2. Can’t find any lose grounds. 1997, 58, f150, ford, injector, pulse 1987 - 1996 F150 - 95 F-150 5. 8. I have spark to the plugs, fuel to the rail, I hear my pumps prime. 2 posts • Page 1 of 1. C4 Tech/Performance - 1988 TPI: No injector pulse. Since you tested the harness and its fine, then the only other thing to check The current problem I am trying to resolve is no injector pulse. i recentlychanged out the cam phasers a few days later the truck shut down on me while driving at highway speed's the This year alone, I have had three vehicles that needed a set of new injectors to resolve a no start problem. 1999 - 2016 Super Duty - 2003 F250 no injector pulse - Hi I am new to this forum thing so I apologize in advance to the administrator it I posted this wrong. 03-24-2010 12:01 AM. When I loosen the distributor and turn it fuel pump kicks on, all working. Ohm wiring from injectors to the PCM and have continuity. But, I am not getting the "pulse" (negative) from the PCM during crank. ECM is for sure grounded. Navigate the touch screen to the dashboard to watch the RPM. Also, no power to the fuel pump. It's alive. No fuel Also no spark SPONSORED LINKS. 7 Tbi no injector pulse while cranking - Cars & Trucks question. Change both. No pulse at all from either injector? This thing ran when I parked it to work on it. So the issue is it has no TBI inj ground pulse during crank if I dump fuel down the TBI unit it will start and run as long as I don't shut it off. Theres no spark and no fuel injector pulse. Re: no spark, no injector pulse PLEASE HELP!!90 geo tracker no start, no injector pulse I have a 1990 geo tracker with the 1. When I hook up a test light to the ecu pin while cranking, it pulses. Checked for power to the coils and don't have anything on the middle terminal. noid light on injector harness = no pulse while cranking but pulses as normal when car is fired on starting fluid. A. 5 ms. . I have power to the rim at all the points it should. 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - No injector pulse - Hey guys working on my new project truck, after all my checks on the factory 302 F/I found no power at rail pump and no injector pulse. It was not running but I thought it to be an easy fix. Check the top wire on the TFI for a PIP signal while cranking. So looked it up in the book and tested the power to injector. 29 posts · Joined 2017 Add to quote; Only show this user #1 · Jan 14, 2017. Was this . The car is getting a lot of Backstory: Driving along and suddenly engine died. If no electricity at the positive terminal may be a sign of a blown fuse or a broken wire in the fuel I have a 1992. answer. C4 Tech/Performance - 89 Vette No Injector Pulse - I'm stumped, VATS does not disable the fuel pump; it disables the injector pulse. The first time I ran into one of these, I mistakenly replaced the engine computer in an attempt to fix the no injector pulse condition. I was thinking it I have searched these forums quite a bit and did not find my answer. My Having no spark and no pulse to the inj. The reason behind this is the failure of the computer’s injector driver circuit, which controls the fuel injection system. Effects of No Injector Pulse. Fuel pump is working. Find the answer to this and other Car questions on JustAnswer. Took it to a diesel shop and they couldn't figure it out either. i have power to all the fuel injectors, but apparently no ground. Therefore there's no injection pulse. The truck has correct fuel pressure, 12v to the injectors, steady spark, and will start with a shot of ether. Ran fine one minute, operated battery cut off switch and now will not run. Replaced caps on ECU. Before fuel injectors came along, cars relied on carburetors to mechanically mix fuel and air for combustion. I swaped out the afm with a 84 and no change. 12-07-2002 02:50 AM. I On GM cars the car can be allowed to crank but it will disable the fuel pump/injector circuit, all injectors have power but it is a ground signal which makes them fire. #1 – Your Fuel Injectors Are Clogged. I will check the timing but I think I'm chasing a bad ground or bad ecu. I traced the pulse (-) wire to the PCM and have continuity thru the wire to the injector harness but no pulse. Search Fixya. Thanx for the input though. Fuel Injector Diagram. Since you tested the harness and its fine, then the only other thing to check is the wiring from the fuel injection harness to the ECM. Still no fuel, can hear pump running, so started diagnosing. Cranks and starts with easy start. A bad engine computer can cause no injector pulse even if you have fuel pressure and spark. Have checked resistance/voltage on injector end of looms and all is normal as well when the car will not start. If the pulse width indicates a drop to 0, must be a reason for it. checked pulse with noid lite also checked all wire for ICM and injectors for continuity from ECM to each part also checked entire Fuel Cutoff Mode: The PCM cuts off fuel from the fuel injectors when the following conditions are met in order to protect the powertrain from damage and improve driveability: It does this when the ignition is off (prevents engine run-on when the engine is hot); when the ignition is on but there is no ignition reference signal (prevents flooding or backfiring); when the engine 4. No air leaks. Getting Crank signal = RPM 120-150 cranking Voltage, gnd and pulse sígnal. I was wondering if there is anyone in Australia I can get my auto electrician to talk to about the problem. Still no NOID pulse. When I turn the key it cranks and sparks but I'm getting no injectors signal. my only idea is a bad ecu now. I would get an injector pulse sometimes, but not all the time. All of the grounds are good. ok its a '97 Gp 3800 non sc. The injector shouldn't pulse at key on unless there's noise on the crank input. I will preface this with the usual requirement that we also have complete injector characterization data (flow rate, offsets vs voltage, short pulse nonlinearity compensation) before No matter the style of fuel injection, the same 10 most common problems can plague each system, but we have the simple answers to fix them. 6 Zheng et al. The 1990 Subaru Justy was the last car sold in the United States to have a carburetor; the following model year, the Justy had a fuel injector. fuel injection will not fire no pulse? 60 . The ECU is from a running 77. So why isn't this POS running . Replaced pump, have 60/70 psi now, and I have spark. Related Fuel Injector Replace/Remove No pulse on the fuel injectors is the result of the engine not turning over. Read what I?ve done below; help! - So, this ?88 I picked up non running will crank strongly. By following the troubleshooting What causes no injector pulse? When the fuel is sprayed and makes a mixture with the air inside the intake manifold, and due to low pressure in the intake This problem of no injector pulse can be traced down to a simple lack of power - no power input. No injector pulse. 5-6. I have perfect fuel pressure and can hear pump working. dotapvd New Member Posts: 1 Joined: Wed Sep 08, 2010 12:45 am Truck: 1995 Ford F150 4. If voltage drops fuel pump relay is functioning, and no further testing of the fuel pump relay is necessary. His diagnostic tools are somewhat limited so he referred me to the dealership since they have more extensive testing hardware. zach-Ka Posts: 1549 Joined: Wed Oct 17, 2007 9:08 am Car: 1990 240sx (SR) Location: Greeneville, TN. And/or the Camshaft Position (CMP) 2002 VW GTI with CRANK but NO SPARK, NO FUEL INJECTION FIRING with CEL Help us help you. Jeep fires if I use carb cleaner fluid, just not getting injector pulse spray. No fuel pump noise at key on. - I have all ready checked out my injector relay and replaced it doooo to corrision. C4 Tech/Performance - 84 crossfire no fuel pulse to the injectors - Hello. From looking at the wiring digram the injectors are controlled by the ecu there is 12v on one side of the injector wiring and the other side is suppose to be grounded by the ecu. solonoids all seem to click when jumping them to b+ . VS Commodore V8 wont start. I get 10 volts to each injector in key position 1 , the voltage drops to 8 or 9 volts on crank. As far as sending a pulsed signal to the fuel injector, to me that looks like engineering data would be required. got new computer and sent out to reprogram,. The ECM controls the length of time the valve remains open (injection pulse duration). sarco2000 Discussion starter. There is no fuel output while cranking. Injectors are not clogged and just to make sure, I changed bank two cam sensor (controls injector pulse) and crankshaft sensor. Tags. 44psi @ rails, have spark on all 8, car starts on starting fluid then is drivable. -----Will not flash codes. With engine "off" and ignition "on", check for fuel leaks. 6L, 5. All injectors are good. It is not the injector harness as I have cut that off to test wires down to On GM cars the car can be allowed to crank but it will disable the fuel pump/injector circuit, all injectors have power but it is a ground signal which makes them fire. I finally got 4 of the 6 clicking this way - tried the starter, and got fuel burning! I got the other 2 freed up and clicking loudly. when i jumper at the self test connector, the pump runs If for some reason the Fuel Computer does not know the engine is turning, it will naturally not send out the timed ground signals to the injectors. But fuel injection has been No power to fuel injection fuse? Jump to Latest 930 views 5 replies 4 participants last post by Nbafan21 Sep 4, 2024. I have verified that I have correct fuel pressure. Still will not start. tps voltage is . The only thing I see is that "The pulse width controlled checked injectors with a noid light, and got no pulse. It is a customer car for me to help the owner with and I am a bit new to the world of fuel injection and modern cars. Browse Categories Answer Questions . I got a noid and found that there is no pulse to the injectors. Hopped back in at the end of the day and it would turn over but wont start. d) at this point, there should be 12V at the fuel injectors. Everything else works. If i understand what you're saying; change the Injector Close Angle to move the injection point. The only thing keeping my car from starting at this point are the injectors. their exact diagnosis is as follows: "multi-point inspection. Good spark, 42psi at rails (I get the 2sec prime on key-on too), oil pressure reads very good, but no injector pulse! Engine fires if starter fluid is I have a 1988 s10 with a 2. So my issue is I havve no injector pulse. Bought a new ECU off ebay and that did not fix it. I removed the optispark again just to be sure it was correctly installed, and it was. Will spark, but no injector pulse. Hi all. Used all original electronics and tbi. I need some help with a no fuel issue. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. Been struggling to get my truck to start after rebuild. I also have an 84 and 90. im very experienced with all types of car repairs from complete engine rebuilds to custom wiring harnesses. 1- No pulse at injectors (good fuel pressure at the fuel rail). Save Share After further testing, it appears that the fuel injector is not getting any power. Jump to Latest 60K views 59 replies 13 participants last post by Pwez Feb 23, 2024. Direct injection of liquid fuel inside the combustion chamber has allowed significant improvement of indicated efficiency in both diesel engines and, recently, also spark ignition engines, thanks to its ability to generate nearly stoichiometric, locally ignitable mixtures in-cylinder while keeping the global equivalence ratio low. Did more extensive testing, TPS good, injector at 1ohm, wiring good from ecu there will be no injection. Crank sensor looks fine and the crash damage (see below) was no where near the sensor (LF hit). I get power I have no injector pulse and truck will not start. I have checked for continuity and it's all good. 3L, 5. The Powertrain Control Module (PCM) uses the trigger signal from the Crankshaft Position (CKP) Sensor. Just replaced fuel pump and filter. I am building a truck for my daughter I took a 1984 s10 4x4 and swapped in a 5. checked injector pulse and nothing(not grounding),. The TFI and PIP sensor is a stand alone system. if #1 NO and #2 YES, you have power problem to fuel-pump. Reconnect electrical connectors to fuel injectors. - Wired in second distributor and spun with key on. What we don't know is whether the injector is getting shutoff because of the misfire, or if the wire from injector #4 to the PCM is shorted to the engine or body on its way to the PCM, or if the PCM output for injector #4 was wiped out by the shorted harness, or if the PCM is not firing the ignition coil at #4 position due to a still shorted (or open) harness, or the PCM output No injector pulse 2006 6. Any ideas? Thanks so much 2008 3. And it pulses. 6. I have no security light and no codes set or pending . [34] conducted numerical simulations to study the combustion characteristics of sinusoidal pulsed hydrogen jets and steady jets with different frequencies by using the Shear Stress Transfer k-omega model. The fuel pressure was not holding for more than There are a ton of possibilities why there would be no pulse at the injectors. Each injector has 2 wires: a red & another (3 should have Tan; 3 White). 8l no injector pulse, has injector power,has spark,has fuel pressure - Buick Cars & Trucks question. 5L motor. What would cause the computer to stop sending an injector pulse 3 to 4 seconds after the engine starts? The PCM uses various sensors to determine how much fuel is needed. Shashank DS wrote: ↑Mon Feb 04, 2019 6:49 amAlso, How do i vary the pulse width of successive pulses? Change the variables that create the 240Z, 260Z, 280Z Performance / Technical - No FUEL, NO Injector pulse. replaced crank sensor,. Replaced plugs, fuel filter and fuel pressure regulator. We called the previous owner and he said he did a swap from manual to automatic on it. Push down on injector until it is fully seated in the fuel meter body. Replaced distributor five months ago. Hey everybody, i have a 1989 nissan d21 4x4 3. Won't start on starting fluid either. Should be 12v. Car suddenly stopped running. 1 post · Joined 2016 Add to quote; Only show this user #1 · Oct 20, 2016. Also, I do not know if It turns over, has a spark, has fuel at the rails and will attempt to start if fuel is squirt into the intake. I regained pulse on crank, injectors would spray roughly 5 times then dribble, priming the fuel pump with key would create the same thing again. i guess passanger side doesnt spark till motor starts? found no injector pulse,have great fuel pressure. This will be a beginners guide to some basic troubleshooting for a fuel injected bike. Told it was the ecu. It ran 6 months ago but now has the cranks fine but no start problem. Tach in +12V via two wires, one ignition power, one main. helpful? Yes. XJS ( X27 ) - No fuel pump or injector pulse - Hi all! For the past months I have been hard at work on my next xj-s project. it will drip very slowly without 12v to the fssw and will drip a tad bit faster with b+ to the solonoid. I can spray carb clean in the throttle body and it runs great while spraying. 1 2 3. This is my third C4 Corvette. tapping the coil negative 3 times to ground, causes ALL injectors to click. i have a 1990 f150 that i want to test run . Ive done my homework but here is where I'm at currently: I have a VATS delete chip from PCM of NC, new injectors, 42 lb of fuel pressure at the Now it cranks but no injector pulse no spark and only fuel delivery on prime up. In case you're wondering, one type belongs to the Central So I got fuel pressure 5000+psi, I got injector pulse and it does runs off of starting fluid (glow plugs disconnected). Due to life's curve balls my 2020 Himalayan sat in the shed with the tank off for about 10 months. Definitely has spark and 12V to both wires of injectors just will not switch them to earth to cause them to pulse. gauge. I have 12V to the yellow/red wire, but the other is not being pulsed to ground to fire the injectors. Remove push on connector (small red/blue wire) from starter solenoid and turn ignition switch to the Run position. Compression is beautiful, getting spark, fuel pump is pumping fuel, unhooked fuel line from filter and its flowing, etc, i went ahead and sprayed some BG intake cleaner into the TB and it fired up. Had injector pulse test and no pulse. 1986 GT T-Top. So if you have good fuel pressure, the EEC is getting that signal. Fuel Injection, Carburetion & Fuel System - 90 model f 250 351w no injector pulse - I got a problem with the injectors there getting power but no pulse, what do i need to do to trace the problem, not sure what to do next! any suggestions! thanks!:confused: Log In; It is a customer car for me to help the owner with and I am a bit new to the world of fuel injection and modern cars. There are other methods. no injection pulse. Feb 10, 2024. I do have power to the injectors, but there is no injector pulse when cranking. BlackVXGTS. Atvtec1 Discussion starter. 1. Report; Follow; Asked by GuruYSD47 Feb 17, 2020 at 02:36 AM about the 1986 Mercury Grand Marquis Colony Park Wagon RWD. T he amount of fuel injected is a program value in the ECM memory. The fuel pump should be running. it still sends a signal to the PCM that it uses for the fuel injection timing. Thanks "79-280-ZX"! I decided to try "shorting BRIEFLY" pins 101-106 on the ECU connector. 0 and im getting no injector pulse. 6 5spd 4wd. found that a suitable multi No injector pulses 11-01-2022, 01:51 PM. Maybe fuel injector are not spraying, or Update: I have 51-52 lbs of fuel pressure. when fuel was poured into the intake - engine ran for a few seconds - so spark is fine too. Leave it running for a little while it will C4 Tech/Performance - cranking - no injector pulse - 1991 L98 auto - no start. Fuel Pressure = Good 62psi. If the G signal is not present while cranking the engine, the ECU will Hello all, Recently bought a 91 crewcab square with a 454 TBI with a 4l80e behind it, after vehicle has been shut off, after more then 30 seconds it won't restart, found injectors to The first time I ran into one of these, I mistakenly replaced the engine computer in an attempt to fix the no injector pulse condition. General F150 Discussion - 4. Relay was $20USD, CPS is $40USD and express postage was $50USD. 1975 - 1993 240 1983 - 1992 740 The EZK module provides the signal to turn on the LH fuel injection module; it is the circuit from EZK connector pin 13 to LH connector Pin 1. Started with an occasional crank but no start, but would start with a shot of ether. Install fuel meter cover gasket. D. I checked all wires going to ecm from TFI module. Bad driver in ECM/PCM Read full answer. the NOID test m must be done (best) with injector pulled, and I have a 1988 s10 with a 2. At key on the pump runs continuously (does not cycle off). Electrical Faults. fuel injectors dont pulse, spray starting fluid truck will start. Couldn’t do it. I am not getting a steady ground pulse on cylinders 2&3. If the pulse width is too low and the RPMs are too high, this could indicate a clogged fuel injector. Any ideas ? Log In; Register; Forums. Ohm wires from injectors to PCM and have continuity. Injectors do have constant 12v on purple wire with key on. PIP signal seems to be working. From there I decided on a fuel pump and filter, changed filter, no change, pulled bed and tank for pump replacement, found a previous owner had installed longer hoses from chassis to tank resulting in the pressure hose 1995 buick 3. Removed injectors, just to make sure and can click them and watch fuel run through when jumping directly to battery. Fuel Cutoff Mode: The PCM cuts off fuel from the fuel injectors when the following conditions are met in order to protect the powertrain from damage and improve driveability: It does this when the ignition is off (prevents engine run-on when the engine is hot); when the ignition is on but there is no ignition reference signal (prevents flooding or backfiring); when the engine 1987 - 1996 F150 & Larger F-Series Trucks - 5. As the title states, my injectors are not firing. I checked grounds and everything seems ok. The ground side is the one closest to I'm sure this has been covered, and I have read the posts on it, but still need some feedback. I ordered a CPS and relay from pelican. I drove to work 2 Fridays ago with no problems. Having problems with my injectors, fuel pressure is good and it will fire on ether, but no pulse to injectors. just no pulse or feed fuel tthrough injectors no matter what. stil no run and no injector pulse. Has RPM when cranking. I also have no injector pulse, no power, not clicking. im getting solid fuel pressure and spark (fires great with starting fluid). 8 Injector pulse - Injectors will not pulse. While cranking the ignition fires, but test light at injectors does not light (injectors not firing). ppv xhxpygv ofeid lurb zegtmin zkxhm nxwasc pgshh dhka moaanw