Still no pulse at the injectors. NO spark or injector pulse. What I do not have is the ground pulse to fire the injectors. There is no power going to the Crank pos sensor and Cam Pos sensor. Vag com hooks up fine, I can energize the injectors and i register a tach signal in vagcom. 0L Turbo) 9: 11-22-2009 02:04 AM: No spark, No fuel injector pulse. No injector pulse is usually a PIP problem. My friend has my hp tuners, so I won't be able to scan it until tomorrow. problem now, tried to start nothing cranks ok, no start , good fuel pressure , good spark. Main relay can also cause no spark. My search still continues. The vehicle being tested is a 2007 Hyundai Santa Fe 2. mmikeman · Registered. The PCM has a few ground points near it, some are circuit specific, I would think the injectors would be, so make sure all the grounds near the PCM are clean and tight. To do this, there is a period of time that you apply full battery voltage [peak] current, then switch over to a lower. But those damned fuel injectors just won't open on their own. -Fuel pump (Primes)-Fuel in fuel rail's-Manually pulsing the injectors-Harness is connected. theres power going directly to the msd from the battery but. could it be that an injector is shorted messing with the rest of them. Quote; Post by lilskyline240 » Sat Apr 05, 2008 9:00 am. Fuel pump primes when key is turned to run position. I had it back for three days then this morning went to leave and it wasn't starting. now i had a look at another one of my vehicles which has l76 6. Fuel Pressure should be set to 37-45 PSI with the engine running, vacuum line on the fuel pressure regulator. The crank sensor can cause no spark and no pulse to the injectors, however, it would be the ground side of the injector harness that was missing. Shebuilt · Registered. well no spark no fuel pump no injector power i'm thinking it the ecu i'm just not sure if there is any other problems that could cause this to happen any ideas Welcome to the WRR/X Forum A place to share your passion for the WR250R/X!. where should i start to diagnose? TIA EDIT: Narrowed down to p1500 code fuel pump relay electrical circuit malfunction. The car has a new crank sensor recently installed ran well for a while and now has no injector pulse. Fuel pump is working, it's got spark, but no injector pulse. So engine has spark, injector pulse is there but something is still not right. security lights not on but i believe it's in the security somewhere but my manual gives me no infomation other than it shows the decoder in the. No spark, no fuel. I trust you used a noid light or led test light to check for injector pulse. Jump to Latest Follow 1 - 4 of 4 Posts. also whats your Voltage while cranking over? ive seen the Haltechs have that issue when voltage is low. The only other thing that can cause this is a bad ECM and that is rare but possible. If the ECU shows no change in the MAP voltage while cranking it won't pulse the injectors. Now we are ready to start the car. The ECU sends a grounding signal to the appropriate pin and the injector fires. I had it back for three days then this morning went to leave and it wasn't starting. No Start No injector pulse (shorted injector) part 1 - Duration: 14:42. The vehicle being tested is a 2007 Hyundai Santa Fe 2. Pulse width is a term to describe how much average voltage is applied to an injector coil over a given time span - typically about 2. Yes I used a noid light first and there is NO PULSE. still need help. if no spark there will never be injection until you get it (not u) there are 2 transistors driving all 8v kicks and trackers. I check the following items, crank sensor, cam sensor and wiring, I also check all the power input and grounds going to the ECU fuses all check OK. My 11 Second AU Fairlane. I read a post on Just Answers from a technician named Frank back on August 6 2006 and he spelled it out this way. This is actual a 24v 2. no injector pulse. If you pray ether into the engine IT WILL run. The fuel injector can be compared to the heartthe injector does the pumping. In this case a DRB III. 3 no spark or injector pulse \015 I have no rpm input on scan tool. I am down to tracing the injector wires. The TSI engine (like many modern engines) uses direct injection, which places the fuel injector in the cylinder or combustion chamber. My friend and I took the injectors on my 98 wrx swap out to test and clean them, re-instralled them and now it won't start. No injector pulse is usually a PIP problem. ) It also has no injector pulse at the injectors. the interior swap harness is a hybrid one that came out of a running k swapped car, along with the aem ems. I will post an update next week guys. 3L cranks but no run no spark no injector pulse: kartracerdad19: 4-Cylinder Tech: 1: 04-27-2012 02:36 PM: 2000 Ford Ranger Front Hub Bearing Pair 4x4 With Rear Wheel ABS & Pulse Vacuum Hubs: 1ATony: Vendor Section: 0: 11-17-2011 12:54 PM: 89. The period of time is known as the injector “pulse width” and is measured in milliseconds. You can keep your original and have this one as a spare. We are testing if the ECM even has power, as a power failure will result in both no spark and no fuel or injector pulses. Re: No injector pulse Help I would also check that you have 12V at the injectors, the ECU might actually be triggering the injectors but there might not be a B+ Signal to energise the injectors. Joined Oct 3, 2013 · 31 Posts. I do get an RPM signal on crank of about 200-250 but there is no injector pulse or spark. I used the following for my three wire hookup to the engine harness from the AAW accessories connector: dark blue fuel to gray fuel power feed on harness, orange BAT1 to orange constant power, and pink IGN1 to pink ignition on harness( this also says. I'd go with the crank position sensor 1st. Here is the checklist: Painless wiring harness. i'm working on a 78 280z for a buddy had a bad fuel pump so i replaced the pump now i have plenty of pressure but no injector pulse it does have spark and runs excellent on starting fluid. Hi all, we are trying to start up the t/a and are having spark and injector pulse issues. Bimmerforums is the preferred online BMW Forum and community for BMW owners. 1 v6 automatic 4 door. Have continuity from coil/dist and igniter and ecm. Hi guys I have a ve ss and have no injector pulse. Just looking for some final input before I go wasting money on random components. I already bought a coil as a first test. Tested injectors with a test light, comfirmed no pulse at injectors. The ECU sends a grounding signal to the appropriate pin and the injector fires. done a bit of research and narrowed it down to the immobiliser, could it be the immobiliser has armed or something more simple that I've missed? its a 1. There are two so I believe they both supply a pulse to the ECU which then figures out timing and then pulses the injectors appropriately. I have spark ,i have fuel pressure I have power to injectors but no pulsecould it be a fues causing this?? Joeyxxx , May 10, 2020 at 1:25 PM. First up, check that you have power at the positive side of the coil with the ignition on. I pulled the old 4. Hi all, we are trying to start up the t/a and are having spark and injector pulse issues. ECU uses ground to pull the injectors low on one side. Not sure where to look from here. replaced ignition module and crank angle sensor still no spark. Spark But No Injection pulse. I thought it might be the ECU, but I swapped them out and it still does the same thing, cranks but won't start. i blew head gasket on old motor so put new/used motor in, same 4. 9L Distributor ignition, multi-port injectors 2 fuel pumps (pre-pump in tank, main in frame, both are new) New ignition module (2nd new one) Car runs for 30 - 58 seconds and then looses computer pulse to injectors, does not lose ignition spark or fuel pressure Any ideas what is causing the loss of computer pulse? Additional details. Fuel pump primes when key is turned to run position. Usually, the injectors have two pins. I didn't want to bore you with the entire series of events so I left out what I felt wasn't needed to say. Replaced cam and crank sensor, and timing belt is good and time is correct. Similar Threads - injector pulse spark Forum Date; No spark or injector pulse: 4th Gen Camaro LT1 (1993-1997 Camaro) Aug 26, 2007: Injector pulse width: 4th Gen Camaro LT1 (1993-1997 Camaro) Jun 17, 2017: Planning on doing the LT4 hot cam and have a injector question: 4th Gen Camaro LT1 (1993-1997 Camaro) Dec 3, 2017. 3L it cranks but will not run, has no spark or injector pulse. There was no spark or injector pulses when it was time for start up. It's not the radio suppression relay, not the fuel pumps, there's spark,. If you feed power to the fuel pump at the inertia switch or at the power distribution box, you get 40 psi no problem. 2002-01-01. The vehicle being tested is a 2007 Hyundai Santa Fe 2. Removed the UTEC still no start. In a few seconds, the injectors would fill the throttle body!! Besides the either "Wide open throttle" or zero injector pulse, I also have no spark at coil, so no spark to distributor or plugs. Checked all the basics, but it has no spark, and no pulses at the injectors. i purchased the car and had heads rebuilt installed with new gaskets and all surfaces machined. I also checked and verified spark on two random wires. -Engine Turns and Fires(got spark) but no injection pulse -There is power on DME pins 27 when key turned , constant power to pin 18 when off and power on pin. Also pulled a plug and no fuel on it however I do have fuel pressure. I can't get the injector to spray fuel. Grab the wire a few inches from the end and pull it up slowly and see if/how far the coil will throw a spark. it is an auto pcm, but was running and driving fine before. If there is no spark then the fuel ECU thinks the engine is stopped and will not pulse the fuel injectors. Discussion Starter • #1 • Aug 13, 2013. If it doesn't flash there is a coil trigger problem or a power supply problem. '91 S-10 Blazer Fuel pressure good but injectors wont squirt (no injector pulse) both. any:confused. Hence with a weak PIP signal, and the SPOUT in, you could get spark but no injector pulse. I checked with noyd light. 91 Chevy 305 tbi no spark no injector pulse My truck was going down the road and just died on mei cranked it over a few times it fired and drove for about 400 yards and died again. I guess no one readsinjector pulse comes from ecm. maybe bad conection, but hoping maybe something else that is bad that will cause the ECM to not send the signal to the injectors. Chevrolet k1500 getting spark to all plugs, gas to TBI, continuity from ECM to injectors, but no pulse to injectors. The PIP sensor supplies the timing pulse to trigger the TFI and injectors. just finished my motor build. 2001 saab 9-5 starts then stalls, no injector pulse. i purchased the car and had heads rebuilt installed with new gaskets and all surfaces machined. 7L 2WD-no pulse at injectors and no spark at plugs - I picked up a used 1993 Chevy C1500 Silverado 5. Any info would be great Thanks. Discussion Starter • #1 • Feb 10, 2017. STravis · Registered. Any one have any ideas or run into this before?. 0 and im getting no injector pulse. I have limited data on Mercedes as I am using Mitchell Which has been of very little help. 1994 - 1995 Specific Tech: 3: Mar 12, 2010: injectors/ spark plugs: Fox 5. Why does my car have no injector pulse or spark? Crank position sensor. When the truck sits for some time, it will start for about half a second and then quit because the injectors are not pulsing. Luckily the vehicle owner brought a second key for the vehicle, allowing the shop to clear the codes. This lets you start with a smaller pulse width and ramp in more pulse width, or start at full pulse width and reduce it. A plasma arc welding apparatus having a coaxial wire feed. Verified good fuel pressure at the rail, verified spark. I switched injectors to stock and have 8 set of these injectors and no matter which injector I use, the #2 cylinder isnt getting fuel. My friend has my hp tuners, so I won't be able to scan it until tomorrow. He recently put a new engine in and the car is not starting. i have tried every thing,new ccm,coil, ignition module, even distributor,no help. Joined Oct 3, 2013 · 31 Posts. I really appreciate the thought and insight you have given to this problem. I have no injector pulse and no power to injectors on the Terminator EFI. I'm hoping it's crank sensor related but wasn't sure. As I mentioned I checked the trigger points and they appear to open and close that part of the circuit. All the injectors are ticking perfectly fine. Main relay can also cause no spark. Motor Cranks and turns over just fine. 2 ohms,all 4 were within that range. Experienced tech stumped: turns over but won't start; no injector pulse. Joined Jun 26, 2005. NRMA guy told me it was probably the crank angle sensor so I replaced it but still no start. Bimmerforums is the preferred online BMW Forum and community for BMW owners. Have continuity from coil/dist and igniter and ecm. I went over it a couple more times today when trouble shooting. Diagnosing for no spark takes priority with the flywheel sensors topping the list. Have you checked for any DTC's. Looking for abbreviations of IPW? Indirect measurements of injector fouling such as injector pulse width (IPW) Spark-Ignited Engines. Jump to Latest Follow 1 - 8 of 8 Posts I assume you tested the injectors visually and noticed no fuel being sprayed from either one. wire that goes to ecm to ground injectors was checked. The 4-wire plug on the left (also 92 engine harness) has no match on my 91 distributor, but the big black/yellow trace wire was 12 volt and placing it in the two-wire plug gave me spark, but no injector pulse. if the noid light is flashing you have injector pulsesince you have that AND spark that rules out crank sensor. 08-20-2010, 01:14 PM. Rewq246 · Registered. Auto trans. Now it cranks, but won't start. Status: Offline. Main relay can also cause no spark. Use the NOID to check for injector pulse when cranking. Tried it, no luck took a quick check for spark and there's no spark. If you use the key, there is no injector pulse while cranking. NRMA guy told me it was probably the crank angle sensor so I replaced it but still no start. 6 twin screw. I was wondering if there is anyone in Australia I can get my auto electrician to talk to about the problem. Took your advice and replaced the fuel pump harness. Took an injector out and cranked it; had maybe two very little random sprays, but didn't seem too powerful. Joined Nov 23, 2010 · 40 Posts. We've tried setting the ecu to stock settings and back to 93 octane stage 2 ap and checked all the wiring. 1994 - 1995 Specific Tech: 3: Mar 12, 2010: injectors/ spark plugs: Fox 5. The problem has been on going for a couple months now. I went over it a couple more times today when trouble shooting. Checking the car out it has no spark on the plugs or the coil. Did not pull the SC or fuel rail just did gaskets harmonic balancer and those sort of things so I've got the motor back in the car and can't get it to run. We replaced distributor and now has spark. All grounds are clean and tight, the CKPS and TDC sensor ohm at 2. Put light across the plug. A Noid light will verify signal. I tested the ignition coil and found that it was bad and replaced it. Had same problem before fuel pump was replaced) checked all grounds, checked fuses, relays, fuel pressure, spark finally no injector pulse didn't have voltage to injectors with koeo. We are getting an intermittent pulse on injector and coils. 6 ohms) Checked wiring continuity from injectors to ecm ok (cyl 1-4 joined & cyl 2-3 joined). If the spark is clean and matching engine rpm but the injectors are not then check the signal from the Throttle Position Sensor (TPS). No spark or injector pulse (1997 Ford F-150) no fire or pulse. Joined: Mar 18, 2010 Posts: 209 Likes Received: 0 Location. mmikeman · Registered. The CKP(crank position) sensor runs the spark(via PCM), and maybe the injectors if there is no CPS. it has spark swapped the fuel pump as I had a suspicion the pump died got pressure to the fuel rail I tested for injector pulse and nothing. I have a no start condition. can pour fuel in trottlebody and will run til fuel is gone. Ok so here's the deal. 95 GMC C2500 5. 3 no spark or injector pulse \015 I have no rpm input on scan tool. No fuel injector pulses from the fuel injector connectors as tested using a Noid Light. I have been battling this car for a few weeks now, tried swapping out parts from the fuel pump/fpr/crank sensor as well as a new fuel filter. ive checked all sensors with the help of helms ,have spark have fuel pressure ,timing right on ,we have 12 volts to same color wires on all injectors but no ground pulse so i back probed the wires coming out of ecu to injectors and they have battery voltag instead of ground i guess i need to ask if i did this right and if so seems like ecu is bad ,99 prelude base auto bone stock bought it not running was told it just would not start one day. ScannerDanner 261,418 views. Spark, compression, fuel - no injectors pulse. WHAT things make the DME ouput an injector pulse, or maybe, more accurately, what things will KEEP a DME from ouputting an injector pulse. 2 minutes later they come back to life and car starts U can tell when the car isnt. Well i found what was causing my engine control fuse to blow. On an E30 (3-series), the module is located next to the ABS control module (on 86 and later models, with ABS) to the left of the steering column, under the dash. Connected a diagnosis diode to one of the injector plugs and am not getting any pulse which explains why it's not starting. It is a VU with an L67 fitted. A bad crank sensor would prevent both spark & injector pulse. i have all 3 grounds in the correct. 7 in the Corvette and Camaro. drgnbody · Registered. The problem has been on going for a couple months now. It started acting up while driving it, seemed like the engine would totally cut out, rpm gauge would. No spark, no injector pulse: 1 Verify voltage to the coil. So, the engine has been sitting in the car for that period of time without running. if power is being supplied to both injectors and coils. For low-impedance injectors (less than 3 Ohms), you need to limit the current to avoid over heating the injectors. Continued cranking gets intermittent on/off pulse signal surges. The next morning I replaced the crank sensor and still NO pulse. no injector pulse. Fuel pump primes, fuel pressure in the hoses, spark is good (so that rules out the CPS). i own an auto repair shop, but don't have any info on this system. I'm just wondering if anybody has encountered this. I have no fuel injector pulse. kingtal0n · Registered. No spark or injector pulse. TYSON Member. If I hook up my snapon analyzer I can manually pulse the injectors so I know that all works correctly. Joined Jun 19, 2006 · 3,923 Posts. 3 lhas no injector pulse and a security light on. 1 988 ford tempo will not start has fuel pressure an spark ,injector pulse but no fuel in cylinder. The shop found the ignition key body was broken and NATS (Nissan Anti-Theft System) immobilizer codes P1610 and P1614. Chances are there is no or weak spark. The distributor serves two functions, One being firing the spark plugs, but the second is pulsing the injectors. Does the ICM control both and could it be bad even though it tested good? I'm at a total loss at this time. I recommend we also check fuel pressure. Changed ECU, cleaned grounds and used a jumper wire to create some new ones. This problem is occurring in a 2001 Legacy EJ25 engine (EJ252AWAWL). Is the Service Engine Soon light on when the engine is running? If so, what DTC's are stored? nothingleft09. Yes I used a noid light first and there is NO PULSE. I can't get the injector to spray fuel. replaced ignition module and crank angle sensor still no spark. I used the following for my three wire hookup to the engine harness from the AAW accessories connector: dark blue fuel to gray fuel power feed on harness, orange BAT1 to orange constant power, and pink IGN1 to pink ignition on harness( this also says. Grounds for all sensors. New injectors, had to replace some of the connectors. Have someone crank the engine--but, hold the plug with a rag so as not to shock you through the plug wire. Engine won't start (new rebuild), it has spark (new opti and coil) but I do not think the injectors are firing. Since that post I have wired in a different harness and checked all powers and grounds and I see no problem. Battery voltage 12. Visitor in New Albany, This could cause no spark or fuel. It simulates the pressure in the combustion chamber. PURPOSE OF THIS ARTICLE Learning how to interpret injector drive patterns from a Lab. cranks oka, tried diff module and when you jump a and b pins at the crank sensor plug and grd the a pin with a test light i get no spark or pulse at the injectors from the ign module. I will post an update next week guys. I have spark. Is the Service Engine Soon light on when the engine is running? If so, what DTC's are stored? nothingleft09. If I hook up my snapon analyzer I can manually pulse the injectors so I know that all works correctly. I get pulses on the other three injectors. i have an 87 s10, it doesnt get any injector pulse when cranking, theres power to the injector, but no pulse while cranking. hey i bought a vs v6 with a blown motor to turn into a dirt circuit car, i stripped all interior bar dash and gauges, removed all lights, swapped motor over and it now wont fire, got spark, got fuel pressure but has no injector pulse but the injectors do pulse when earthed with a test light, would this be the crank angle sensor or is it more likely to be the factory immobiliser, all central. Have tried unplugging the fuel injectors one by one when the car is in no start mood but makes no difference unfortunately. 1G 1g no start, has spark no injector pulse Posted by 90tsi6bolt, Sep 1, 2018. Remember, if you have no spark, you will have no injector pulse. cranks oka, tried diff module and when you jump a and b pins at the crank sensor plug and grd the a pin with a test light i get no spark or pulse at the injectors from the ign module. Thread in 'Technical Questions' started by TYSON, Nov 16, 2014. So, low compression or an ignition problem should be eliminated before looking for a possible clogged fuel injector. I have run ecu test and it comes up all ok. Have helper crank the engine to see if the nylon fuel line sprays fuel. No fuel injector pulses from the fuel injector connectors as tested using a Noid Light. Replaced cam and crank sensor, and timing belt is good and time is correct. 3 no spark or injector pulse \015 I have no rpm input on scan tool. I have an 04 wrx that I bought as a project. Joined Dec 26, 2013 · 108 Posts. $88 - $111. The other thing to look at is how big of a pulse are you commanding. 6 F150, starter spins just fine, but it won't start. RB25DET - No Injector Pulse. please if theres anyone in the south jersey area that is good with wiring, come help me and we'll cook you a nice meal and get your beer of choice, i really need this car back. I pulled a spark plug and confirmed there's no spark. New fuel filter pump and relay. I'm just wondering if anybody has encountered this. I have a 1990 1500 with no injector pulse. Still nothing. 0 and have spark and fuel pressure but no injector pulse. How to test a fuel injector circuit with basic tools (open control wire) How to Diagnose the failed injector and test Its Connectors using a 12 volt test light NO START,NO INJECTOR PULSE Thanks Paul Danner. square inch for each of the three fuel gas constituents appears to be satisfactory for a “spark-plug” injector. Since your getting no spark and no fuel injector pulse it sounds like it is a crankshaft sensor or camshaft sensor problem. I get 10 volts to each injector in key position 1 , the voltage drops to 8 or 9 volts on crank. 0 - Specific' started by SN95. Hello to all I need help! I have 2005 nissan maxima SE 3. We have just finished rebuilding both engines and reinstalled in the boat, Now we seem to have no injector pulse on eather engine. 3 no spark or injector pulse \015 I have no rpm input on scan tool. Re: no spark no injector pulse Don, i checked with a noid light and there is fuel pressure. Here's what I know. i just got my motor in and it wont start the motor is a k20a2 and the car is a 1994 integra. Could it be crank angle sensor or ecu? Thanks, Tyler. Grounds for all sensors. Top 1991 olds 98 no injector pulse Help! Posted: Thu Dec 09, 2010. Why does my car have no injector pulse or spark? Crank position sensor. No injector pulse Okay so i was driving home from work on friday and my car is running perfect, as it has been for a while now. I have no injector pulse and truck will not start. Just got the motor in and ready to fire but it has no spark or injector pulse. I also have cranked the car over with the cas out and Tryed to spin the cas by hand. The result will be the same, no injection pulse. I have fuel pressure but no wet fuel on plugs. I pulled the old 4. have the same problem? Wednesday, January 25th, 2012 AT 7:32 AM. [FIXED] Explorer no spark - confirm my diagnosis was created by Exranger06 1999 Ford Explorer 4. Since that post I have wired in a different harness and checked all powers and grounds and I see no problem. ECM check fine. I went to start it tonight and the same problem. the Main EFI Relay is good. Fuel pressure: good. Any suggestions for further testing? Thanks CRAIG. I'm not sure of the exact location of the module, on the E28 chassis. 1994 - 1995 Specific Tech: 3: Mar 12, 2010: injectors/ spark plugs: Fox 5. Hi guys I have a ve ss and have no injector pulse. ive tried 2 different ecu's and both of them have no issues communication with the car, vcds, and nefmoto. Top 1991 olds 98 no injector pulse Help! Posted: Thu Dec 09, 2010. Engine won't start (new rebuild), it has spark (new opti and coil) but I do not think the injectors are firing. Fuel pump is working. The coil is not getting the signal to fire. btw its a 96 vr gti ant help is greatly appreciated. It is a 91 mr2 turbo gen 2. cranks oka, tried diff module and when you jump a and b pins at the crank sensor plug and grd the a pin with a test light i get no spark or pulse at the injectors from the ign module. A few weeks ago I posted about my problem with injector pulse. 94 1500 4x4 and it has been swapped with a 96 360, 5 speed, and obd2 pcm. We changed the pickup coil and now have a spark out of the coil. Fuel pump primes when key is turned to run position. There's fuel, spark and 12v at the injectors. It could be the CAS also. getting spark, getting fuel to the fuel rail, have reset my ecu. Similar Threads - injector pulse spark Forum Date; No spark or injector pulse: 4th Gen Camaro LT1 (1993-1997 Camaro) Aug 26, 2007: Injector pulse width: 4th Gen Camaro LT1 (1993-1997 Camaro) Jun 17, 2017: Planning on doing the LT4 hot cam and have a injector question: 4th Gen Camaro LT1 (1993-1997 Camaro) Dec 3, 2017. i have tried every thing,new ccm,coil, ignition module, even distributor,no help. Fuel injectors inoperative, one or more injectors either on all the time or will not squirt. I just recently change. 3 no spark or injector pulse \015 I have no rpm input on scan tool. looks the same and has the same connections but it is totally different logically in the program. What could cause both a no spark and a no injector pulse condition? Have no scannable codes by an OBDII scanner - doesn't mean there aren't any others. Also, make sure that you actually have power to the injectors, as there are 2 fuses that supply them. Vag com hooks up fine, I can energize the injectors and i register a tach signal in vagcom. There is still a steady light on both wires. Spray ether in intake, will hit instantly. it will have no injector pulse util i reset the ecu then it will start again as meny times as i repete prosess. I believe the Ecu is not getting the signal to ground each injector. 9L Distributor ignition, multi-port injectors 2 fuel pumps (pre-pump in tank, main in frame, both are new) New ignition module (2nd new one) Car runs for 30 - 58 seconds and then looses computer pulse to injectors, does not lose ignition spark or fuel pressure Any ideas what is causing the loss of computer pulse? Additional details. - Answered by a verified Nissan Mechanic. The car cranks fine, but there is no spark and it seems as though the injectors aren't spraying either. If the spark is clean and matching engine rpm but the injectors are not then check the signal from the Throttle Position Sensor (TPS). For low-impedance injectors (less than 3 Ohms), you need to limit the current to avoid overheating the injectors. Unless I am very unluckyI've got to think that at least 1, if not all 3, of these modules are good. The only other thing that can cause this is a bad ECM and that is rare but possible. If you do have all of these, then we would look to other areas. I'm hoping it's crank sensor related but wasn't sure. 0L Turbo) 2: 10-31-2010 03:13 PM: EJ20G Motor no fuel no injector pulse. tested with a noid light. Finally tried checking the injectors with a noid light and voila NOTHING. What I have done:. 2001 saab 9-5 starts then stalls, no injector pulse. Manually tested pump, both speed sensors, maf etc & all test within acceptable ranges. The spark is fine, i'm getting a good RPM signal, there's power at the injectors and the injectors are enabled. If the ECU shows no change in the MAP voltage while cranking it won't pulse the injectors. I hooked up the sensor tool and the LED's lit up on the unit for module power, cam sensor, and the crank sensor (go figure right). Typically the signal across the fuel injectors are monitored by a scope (train of pulses). Come to find out after I bought it that the previous owner had pulled both gas tanks and some other parts that I have now replaced. I found out I had intermitten injector pulse, about 1 time out of four. Had same problem before fuel pump was replaced) checked all grounds, checked fuses, relays, fuel pressure, spark finally no injector pulse didn't have voltage to injectors with koeo. no pulse at #2,3 injector. Jump to Latest Follow 1 - 1 of 1 Posts. i have replaced coilpack, crank sensor, and a few more things. I have spark ,i have fuel pressure I have power to injectors but no pulsecould it be a fues causing this?? Joeyxxx , May 10, 2020 at 1:25 PM. Fuel pressure good. no codes set. 4 cranks no start no injector pulse no spark? Check the 95 Firebirds crank position sensor first. Joined Oct 3, 2013 · 31 Posts. No injector pulse I worked at a shop about 8 years ago and this 84 US 928 came in with a blown head gaskets and bad rad. I have spark, fuel in the rail and pump is working. Fuel injectors inoperative, one or more injectors either on all the time or will not squirt. I have no injector pulse and no power to injectors on the Terminator EFI. The ECU sends a pulsing ground to the injector, which closes. Or you can check the voltage on the ECU side with a DVM. You should see a spark jump accross the gap of the spark plug if you keep it held against the metal engine. No trouble codes. The engine has only 5,000 miles on it. Theres no communication with the tcm … read more. It is a 91 mr2 turbo gen 2. 6 F150, starter spins just fine, but it won't start. We rebuilt the engine. The PCM is not providing power due to a defective output circuit. im getting solid fuel pressure and spark (fires great with starting fluid). Left my car sitting for a night after 5 minutes of driving and all of the sudden it doesn't want to fire. You may have to remove the spark plugs to let them. December 29, 2010. Now just to get you guys up to speed so I'm not answering a heap of question lol I don't have a DDT,love to get one but nothing. Remember, if you have no spark, you will have no injector pulse. As for checking the fuel injector pulse, I have a pulse light that I plugged into the fuel injector connector. It's a late model 302 Windsor, running a Edelbrock Air-Gap intake manifold. I have spark ,i have fuel pressure I have power to injectors but no pulsecould it be a fues causing this?? Joeyxxx , May 10, 2020 at 1:25 PM. Crank no start, no spark and only one injector pulse I have a 2009 nissan murano that will crank and not start. Author: Subject: No spark or injector pulse: samuel. Honda civic dual TBI units use an auxiliary injector which has a saturation driver and a main injector that uses a pulse width modulated driver. -Fuel pump (Primes)-Fuel in fuel rail's-Manually pulsing the injectors-Harness is connected. A bad crank sensor would prevent both spark & injector pulse. New injectors, had to replace some of the connectors. All of a sudden i loose all power, lights and everything are on but the engine dies. Still no start. cranks oka, tried diff module and when you jump a and b pins at the crank sensor plug and grd the a pin with a test light i get no spark or pulse at the injectors from the ign module. We have just finished rebuilding both engines and reinstalled in the boat, Now we seem to have no injector pulse on eather engine. Fuel pump is definitely running. 75 volts to trigger the TFI module. CEL light does not come on. I have good spark from the coil wire and the #1 plug. I have fuel pressure, but no spark or pulse. Lumina :: 92 Chevy Euro Has Spark But No Injector Pulse Was called today to look at a car that wont start its a 92 Chevy lumina euro with the 3. I have a 1990 F350 crew cab that I recently bought cheap needing a transmission. It will have to be relearened at a dealership. I went to start it tonight and the same problem. 92 ranger 2. thanks guys. No injector pulse Okay so i was driving home from work on friday and my car is running perfect, as it has been for a while now. I have just finished wiring up my E6x, started cranking the engine over and am getting no injector pulse. The PIP signal level needs to be above 6. The engine has only 5,000 miles on it. If you pray ether into the engine IT WILL run. 22re no injector pulse. Also, make sure that you actually have power to the injectors, as there are 2 fuses that supply them. I checked a few things and I had spark, fuel pressure, and power to the injectors but no pulse so I ordered a crank sensor. Audi Original "S" Cars - No spark, no fuel injector pulse, no start. it has no injector pulse and i cannot verify the culprit for the life of me. no spark and no pulse to injectors maintenance & nonperformance. i just got my motor in and it wont start the motor is a k20a2 and the car is a 1994 integra. 1 answer & 0 cluster flash when you crank the engine? If so, you have an key based anti theft system issue. The coil is not getting the signal to fire. The same voltage is shown at D15 and D16 on the ECM and each reduces to about 9. It had a bad Bosch relay by the ECU and I replaced it with a new one from Centerline, now the pump runs as it should. 7LScannerDanner Tools:Related videos - How to test fuel pressure, injector pulse and spark with basic tools - Honda - Symptoms and Causes of Low Fuel Pressure (Part 1. It has spark for the first 3 revolutions and then it stops sparking, the injectors are getting power, but no ground pulse from the ECU. It cranks and I have fuel pressure. have the same problem? Wednesday, January 25th, 2012 AT 7:32 AM. The distributor problem and associated lack of spark did not show in the codes when I ran them. We have just finished rebuilding both engines and reinstalled in the boat, Now we seem to have no injector pulse on eather engine. No spark from all of the Coil-On-Plug Ignition Coils. 1 988 ford tempo will not start has fuel pressure an spark ,injector pulse but no fuel in cylinder. This is an issue with a '95 LT1. Discussion Starter • #1. i am going behind everybody else. Joined Dec 26, 2013 · 108 Posts. I checked all the fuses, grounds under the battery, all the wires from the ECU connector to each injector, wires from the crank sensor, cam sensor, knock. Re: No injector pulse - why? The dizzy seems to be the biggest problem on these engine, try to change it for an other. If the engine is getting spark, that is triggered by the Hall Effect sensor so you should get fuel pulses as well. Hi Guys, I have a problem with my 4. new fuel pump. Topic Viewing 12 replies - 1 through 12 (of 12 total) Author. hey everyone so im trying to get my built block fired up for months now but I cant figure out why Im not getting injector pulse or spark signal. I've been fixing little things on it including the a/c thats on the engine and have been running it and shutting down no prob. You have to disassemble the distributor to replace the coil. EVo8 ecu swap no injector pulse/no spark I am seeking the help of some boosted 3G owners. Model: CRDI 786 C The CRDI 786 C test bench is a dedicated common rail injector, pump and fuel rail testing bench designed for quickly testing all kinds of common rail injectors, pumps and fuel rails of Bosch, Delphi, Denso and Siemens make (Injectors of both Solenoid and Piezo technology can be tested) Testing injector pulse. Fuel pump primes when key is turned to run position. 8 swap in a corrado but i figured the situation applies to a standard 24v as well. 2004 - 2008 F150 - Cranks, but low spark and no injector pulse, no start - Hey guys, I recently replaced my cam phasers and upon putting the engine back together (5. Thanks!! I'm just not feeling comfortable condeming an $800. We have just finished rebuilding both engines and reinstalled in the boat, Now we seem to have no injector pulse on eather engine. Diagnosing for no spark takes priority with the flywheel sensors topping the list. Audi Original "S" Cars - No spark, no fuel injector pulse, no start. 2006 Ford F150 4X4 5. My friend has my hp tuners, so I won't be able to scan it until tomorrow. Does the ICM control both and could it be bad even though it tested good? I'm at a total loss at this time. 2 minutes later they come back to life and car starts U can tell when the car isnt. The shop found the ignition key body was broken and NATS (Nissan Anti-Theft System) immobilizer codes P1610 and P1614. We tested the power off of the coil pack connecters and they are showing that we are getting 12v so I dont think it's a grounding issue. Typically the signal across the fuel injectors are monitored by a scope (train of pulses). 0t TSI OEM Fuel Injector. Connected a diagnosis diode to one of the injector plugs and am not getting any pulse which explains why it's not starting. I have replaced my cam sensors and crank sensor. No spark and no injector pulse. Have spark but no injector pulse. 1 v6 automatic 4 door. Not unusual for a Ford coil pack to lose one cylinder. I appear to be getting no spark or fuel. just got the car hooked back up tonight after 2 years and im getting no rpm signal or inj pulse width readings. Any suggestions? Thanks! 05-09-2010, 03:10 PM #2: RP80242GT+T. This morning, using module #1, I cranked the engine while someone wiggled the ign module connectornothing happened. Just looking for some final input before I go wasting money on random components. I have been struggling. 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. Looking for abbreviations of IPW? Indirect measurements of injector fouling such as injector pulse width (IPW) Spark-Ignited Engines. Don't jump to conclusions like an ECM. I bought some stuff from Casper's to test the sensors today. Tach in +12V via two wires, one ignition power, one main. In a few seconds, the injectors would fill the throttle body!! Besides the either "Wide open throttle" or zero injector pulse, I also have no spark at coil, so no spark to distributor or plugs. Any info would be great Thanks. Replaced cam and crank sensor, and timing belt is good and time is correct. My V6 was running smoothly yesterday, then 20 minutes later would not start. No injector pulse TBI. If the G signal is not present while cranking the engine, the ECU will not be able to identify when to produce the injection signal. It's a late model 302 Windsor, running a Edelbrock Air-Gap intake manifold. The fuel pump is good. Come to find out after I bought it that the previous owner had pulled both gas tanks and some other parts that I have now replaced. I have seen a good spark and no injector pulse on fords, honda, and holens(gm) and all have lead to a pcm ground, but check its voltage as well. ive checked all sensors with the help of helms ,have spark have fuel pressure ,timing right on ,we have 12 volts to same color wires on all injectors but no ground pulse so i back probed the wires coming out of ecu to injectors and they have battery voltag instead of ground i guess i need to ask. wire that goes to ecm to ground injectors was checked. Grounds to ecm and electronics good. It's not the radio suppression relay, not the fuel pumps, there's spark,. Can I test the driver at the PCM for free? I rechecked for injector pulse at the connecter while running the car. My son drove the car to school with no problem and after class he could not get the engine started. I have fuel pressure, but no spark or pulse. Since this is where the spark and ignition of fuel that drives the engine, the injectors are subject to a pretty harsh environment. No injector pulse?! Please help! JordanHoudek: Factory 2. We replaced the ignition module in the distributor, but had no spark still. As the engine heats up the sensor goes open circuit and there is no pulse to trigger the spark or the injectors. No injector pulse is usually a PIP problem. Left my car sitting for a night after 5 minutes of driving and all of the sudden it doesn't want to fire. Finally tried checking the injectors with a noid light and voila NOTHING. Lumina :: 92 Chevy Euro Has Spark But No Injector Pulse Was called today to look at a car that wont start its a 92 Chevy lumina euro with the 3. The ECU sends a pulsing ground to the injector, which closes. you may be getting pressure but no volume from the fuel pumpsounds weird but they are 2 different things. Perform a compression test, bearing in mind that for the purposes of diagnosing a "no start" you're primaruly concerned that compression in the cylinders simply exists. I have seen a good spark and no injector pulse on fords, honda, and holens(gm) and all have lead to a pcm ground, but check its voltage as well. I've had the same problem for a while now. The spark problem was the module being miswired by the person who worked on my car. Here is what I have tested and the results: -All the injectors read about 12. I pulled the old 4. 3, motor has a miss so I checked and cleaned all injectors, changed the coil packs and now still have a miss in the number 2 cylinder. Bought a 1989 prelude that wasnt starting narrowed it down to getting no fuel which turned out to be the main relay resoldered the relay thanks to good write up on here and got fuel pump going and car started up had it idking for good ten minutes but when I moved it it just died out again and wouldn start its getting fuel to injectors and a spark but its not getting a ground pulse to injectors its just getting a 12v source with ignition on I was wondering if it could have anything to do with. New signal wiring was run to each coil from ecu as it was previously setup for wasted spark. If I spay gas into intake, car will run all day. This is the plan. If I hook up my snapon analyzer I can manually pulse the injectors so I know that all works correctly. I have a 911 as in the title no spark and no Fuel I have no spark No Fuel but fuel pump runs when powered DME relay is supposed to be new DME relay Pelican Parts Forums 85 911 No Fuel Pump, Injector Pulse or Spark - Pelican Parts Forums. 1994 - 1995 Specific Tech: 3: Mar 12, 2010: injectors/ spark plugs: Fox 5. AwdBoostCreep: Factory 2. also whats your Voltage while cranking over? ive seen the Haltechs have that issue when voltage is low. 4 cranks no start no injector pulse no spark? Check the 95 Firebirds crank position sensor first. Fuel pump is working. It is a Holley Dominator with a GM LSx motor. Tach in +12V via two wires, one ignition power, one main. 1998 Dodge Ram 1500. Wiring is good, fuses have been checked, fuel pump is running, etc. Eventually find no injector pulse. Miata won't start. I ALREADY SEARCHED THE ARCHIVES, SO DON'T BOTHER TELLING ME TO DO SO. I checked all the fuses, grounds under the battery, all the wires from the ECU connector to each injector, wires from the crank sensor, cam sensor, knock. No start troubleshooting (fuel pressure, injector pulse, spark) - GM OBDI YouTube Free Menu (Chapter 1) Misfire ID, Compression Test, Vacuum Leaks, Fuel Trim, Head Gasket, Restricted Exhaust, Low Power, DVOM. I have spark, fuel in the rail and pump is working. So i'm just trying to star my sr, the engine crank, the fuel pump work, but got no spark and ingector pulse The ecu send me a code 11 ( CAS) when i try to start the engine but i chek the my wiring many times and chek the CAS as its tell in the FSM and every things ok, grouns are all ok too. I have a 1992 Mazda 323 SE. ANd i take the injector out and test it, It spark fuel. Start the car. ) or when I hammer down and get the RPM,s above 3000 the engine begins to miss and shake. master tech at cherry hill nissan pointed me in the direction of a new ecu. Sil240 Posts. New rebuilt engine. i took my car to the shop, they test it for me. It simulates the pressure in the combustion chamber. The engine has only 5,000 miles on it. just want to know how this is supposed to work. Once you've verified if the injector is spraying or not, RE-INSTALL the injector back into its cavity (in the intake manifold) and proceed to the next one. No Spark/Injector Pulse. Sounds like the PCM isn`t switching on. All the injectors are ticking perfectly fine. Module is in good. Checked injectors 3-4 ohms at each. If I hook up my snapon analyzer I can manually pulse the injectors so I know that all works correctly. Re: No injector pulse - why? The dizzy seems to be the biggest problem on these engine, try to change it for an other. Have you checked for any DTC's. Here goes again.