Just got the motor in and ready to fire but it has no spark or injector pulse. The white wire from the distributor to coil was hot all the time we had the key in the 'on' position. He recently put a new engine in and the car is not starting. Hi I am new to this forum thing so I apologize in advance to the administrator it I posted this wrong. We were able to get a injector pulse and spark one time but have. Sounds like you have spark, air, fuel to injectors. That is, the 12 volt supply. They we're able to manually get spark and injector pulse by pulsing them with equipment they have. 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'm just wondering if anybody has encountered this. It has the E4od. No codes displayed. The Fix After verifying that there is consistent spark from the coil, disconnect the injector connector and check for power on the red wire during cranking. Nothing new to me most common problem was ignition control module. Jump to Latest Follow 1 - 15 of 15 Posts. 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. Have spark but no injector pulse. I replaced the whole engine harness, and voilà , it now had both spark and injector pulse. There arne't too many things that will allow the ecu to spark and run the pump on but NOT pulse the injectors. Built many a motor but this newer stuff eats my lunch. Luckily the vehicle owner brought a second key for the vehicle, allowing the shop to clear the codes. 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. The only other thing that can cause this is a bad ECM and that is rare but possible. When the truck is under load (going up a hill etc. - the switching transistor in the ECU is blown/not working. If the engine is getting spark, that is triggered by the Hall Effect sensor so you should get fuel pulses as well. 47V from bat ground to plus pins on injector connector from pcm. My 91 940T has injector pulse, no spark. Similar Threads - spark injector pulse Forum Date; Have injector pulse but no spark: 4th Gen Camaro LT1 (1993-1997 Camaro) Oct 11, 2019: Spark Plugs: 4th Gen Camaro LT1 (1993-1997 Camaro) Mar 22, 2020: removing right front spark plug on 1995z28 camaro: 4th Gen Camaro LT1 (1993-1997 Camaro) Feb 22, 2020. 0 and later code has a cranking taper curve. 2006 nissan xterra 4. no injector pulse and no spark. If I spay gas into intake, car will run all day. By having full spark from the coil and full spark at the plug wires coupled with 12 volts on either side of the coil and to the TFI run and start wire, I think the spark side of the equation is fine. replaced main relay, check fuses all good put new distributor and still no spark and no injector pulse. The engine studders and has terrible rough idle at like 550rpm. Remove one and only one fuel injector nylon tube from it's place on the intake manifold. ebII no spark no injector pulse (PROBLEM SOLVED) - Ford Modifications Website people saying that if its a smart lock problem the the engine wont crank and the fuel pump wont pump and there will be no spark or injector pulse and other say it will crank ect so what the hell will and wont it do if the smartlock is the problem and does the BEM. 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. It did not seem to want to fire if I used starting fluid eithe. Ignition switch relay most time up under the dash by steering column or a CPU/ECM did you have a check engine light on taht stayed on all the time. also whats your Voltage while cranking over? ive seen the Haltechs have that issue when voltage is low. Injectors operate by using a 12 volt supply source to operate a solenoid (via the injector coil) that opens a valve in the tip of the injector. still engine. 1989 FORD TAURUS NO INJECTOR PULSE. Next see if the engine will start in neutral as a faulty trans switch can cause this. Rundown of failure: Was hard to start on occasion, with 20 seconds of cranking and then finally started. ive tried 2 different wiring harnesses. But stop once you stop. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. Removed ecm and inspected just incase a bad cap or anything obvious. There is no fuel pressure sensor that I recall on an 1150. Took an injector out and cranked it; had maybe two very little random sprays, but didn't seem too powerful. rushdylan · Registered. I thought it might be the ECU, but I swapped them out and it still does the same thing, cranks but won't start. When it cools enough the circuit reforms and the engine will run for a while. I'm hoping it's crank sensor related but wasn't sure. 1993 jaguar sovereign 4l motor wont start, engine fires good no spark or injector pulse. Great brakes when first applying the petal. 0 and im getting no injector pulse. 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. Discussion Starter • #1 • Jun 6, 2012. i have a 92 ranger plain jane. no spark & no fuel = no start: Annoying Eric: Normally Aspirated Powertrain: 10: 11-29-2017 07:39 PM: 02 WRX, no spark, no injector pulse. Keep in mind, the valve only flows air. So crank sensor seems ok and spark strength good. No Start No injector pulse (shorted injector) part 1 - Duration: 14:42. 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 the pick-up coil is the problem, you might be better off replacing the distributor. I guess no one readsinjector pulse comes from ecm. Sign in to reply. 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. I check the voltage coming from the Crank position sensor while cranking and its read. spark at all 4 cylinders. This problem is occurring in a 2001 Legacy EJ25 engine (EJ252AWAWL). There arne't too many things that will allow the ecu to spark and run the pump on but NOT pulse the injectors. have spark and fuel pressure. ohh, Jun 24, 2010. Ok so here's the deal. Wait a minute on the ground side of the injector I get no light at all. Now it cranks, but won't start. Wiring is good, fuses have been checked, fuel pump is running, etc. no injector pulse, no spark, no IGN. It cranks over, and has a spark. Has spark - Insure wire continuity between the ECM and the distributor or tach Filter. The owner switched the ignition module over to tbe 86-87 module. replaced ignition module and crank angle sensor still no spark. 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. 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. i took my car to the shop, they test it for me. No injector pulse 304 Just converted my vn calais to 304 and it wont fire up because the injectors are not pulsing, i dont understand why not because it used to run fine before i did the motor swap, if anyone has had this issue and can help that would be awesome cheers Al. Auto trans. R-Sport Cluster. Luckily the vehicle owner brought a second key for the vehicle, allowing the shop to clear the codes. That will cost you a lot of wasted money. I pulled the old 4. no spark and no pulse to injectors maintenance & nonperformance. With a voltmeter or test light Remove plug wire and check for spark while cranking. So we went to fire it up, crank but no start. Sounds like the PCM isn`t switching on. In the pressurised environment of the injector, spring-loaded one-way check valves in each supply line, such as 14 and 15, maintain pressure during pulse off times. For low-impedance injectors (less than 3 Ohms), you need to limit the current to avoid overheating the injectors. Is the PCM dead? Wore out the Haynes manual on this one, so I need you guys to help!. I've tried everything I know to do and no injector pulse. Still no spark or injector pulse. problem now, tried to start nothing cranks ok, no start , good fuel pressure , good spark. But those damned fuel injectors just won't open on their own. - there is no power supply to the injectors (you have that covered). unhooked an injector plug and put the wire in from the light assembly and the light doesnt flashi was thinking i could use it as a cheap noid light, but i guess not or the injectors arent getting a pulse. This is where I would start. Any ideas on what to try next? Im lost! Thanks in advance. Also get a spark tester, the kind that puts a load on ignition system. Discussion Starter • #1 • Oct 12, 2013. 2nd Gen Ram Tech - no injector pulse - ok, i have about had it with this truck and its issues since i bought it. No spark AND no fuel injector pulse ONLY when van is cold Nov 18, 2013 2000 ram 1500 Has spark but no injector pulse wont start Jun 25, 2013 v10 RAM no startfrustrated Sep 19, 2011 help - no spark, no injector pulse, no run Oct 30, 2009 More results from dodgeforum. Just got the motor in and ready to fire but it has no spark or injector pulse. Tach in +12V via two wires, one ignition power, one main. 1 988 ford tempo will not start has fuel pressure an spark ,injector pulse but no fuel in cylinder. We have just finished rebuilding both engines and reinstalled in the boat, Now we seem to have no injector pulse on eather engine. 1993 jaguar sovereign 4l motor wont start, engine fires good no spark or injector pulse. i drove it just down 1995 Winnebago no spark or injector pulse - iRV2 Forums. When I crank I get no spark or injector pulse. 4 volts to the no. Benefits include smoother idle, 1. Joined Jul 3, 2011 · 372 Posts. i have replaced coilpack, crank sensor, and a few more things. From what I have read, this could be from a bad FI computer (ECU) or from a broken wire leading from the ECU to the coil. i took my car to the shop, they test it for me. Engine cranks fine and fuel pump runs. Hi Guys, I have a problem with my 4. Fixed that and still nothing. That engine is a batch fire engine. Unclip the plug wire from the coil, and just lay the wire on top of the coil tower. I also checked and verified spark on two random wires. 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. Checked injectors 3-4 ohms at each. I pulled a spark plug and confirmed there's no spark. I have a 1990 F350 crew cab that I recently bought cheap needing a transmission. I have a feeling that my problem lies elsewhere. Don't jump to conclusions like an ECM. 2001 frontier, no injector pulse. Spark with the SPOUT out, but not with the SPOUT in suggests a PIP problem. 0L Turbo) 2: 10-31-2010 03:13 PM: EJ20G Motor no fuel no injector pulse. From what I have read, this could be from a bad FI computer (ECU) or from a broken wire leading from the ECU to the coil. still engine. Do the injectors fire and spray fuel into the engine. (Engine would not start with starting fluid and no spark arcing from high tension coil lead to ground across a gap of approx 3 mm. 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. Jump to Latest Follow The car will run on starting fluid or if I sprinkle gasoline into the air intake so I have spark. It has been a month and a half now and I have gotten no where. it will start for a sec from the cold start valve but i have no injector pulse i have power to everything including injectors and wire harness is good because i can get both banks of injectors to turn on by grounding out the pins that would connect to the ecu i do have spark, and thought the problem was my ecu. Is it possible that the ignition and fuel circuits have burnt up on the stock ecu due to the lack of load over the past year or so?. The next day it started again and has been running fine but it does this about every 4-6 weeks. So, the engine has been sitting in the car for that period of time without running. The new wiring diagram should really help. 58 psi fuel pressure. 30 psi sounds a little low. 7L 2WD-no pulse at injectors and no spark at plugs - I picked up a used 1993 Chevy C1500 Silverado 5. Other times it starts right up. That was ok because i was building a 1. If you have spark, fuel, and injector pulse but your engine still does not fire we'll have to check for the third element of internal combustion: compression. All fuses are good. theres power going directly to the msd from the battery but. If it doesn't flash there is a coil trigger problem or a power supply problem. just finished my motor build. i blew head gasket on old motor so put new/used motor in, same 4. 3 no spark or injector pulse \015 I have no rpm input on scan tool. -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. No "Fuel Injector Pulse" can be caused by a faulty computer, wiring, or a computer. no spark & no fuel = no start: Annoying Eric: Normally Aspirated Powertrain: 10: 11-29-2017 07:39 PM: 02 WRX, no spark, no injector pulse. this is on a rb25 s2 so it has an internal ignitor. No spark and no injector pulse. 8 swap in a corrado but i figured the situation applies to a standard 24v as well. More Electrical HELP! No injector pulse, no spark from coil. Sep 1, 2018 #1. There is spark but no injector pulse. A failing TPS can trigger the computer’s program to activate what is called the clear flood mode. Another way to test the injector is to measure the resistance of every injector between the two terminals and compare it with the highest and lowest values stated in the injector datasheet; if the result outside the allowable boundaries, then change this injector. There is a sensor that tells the Computer if the throttle is open or not if its dirty it can. 1997 E320 no fuel injector pulse after front end collision. Background: '87 Ford Bronco II, 4x4, 4WD, not extended cab, 2. 0t TSI OEM Fuel Injector. I thought it might be the ECU, but I swapped them out and it still does the same thing, cranks but won't start. After relearning key it started and ran fine. no spark, but have injector pulse - Check the Ignition Module (also check the CCCI and ECM-IGN fuses). Since this is where the spark and ignition of fuel that drives the engine, the injectors are subject to a pretty harsh environment. 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. But we've got no spark and no fuel on the spark plugs. you may be getting pressure but no volume from the fuel pumpsounds weird but they are 2 different things. It will crank but no start. runs on 2 cylinders Getta scan done--may hav some wiring issues too--sensors-or injector driver in computer cud be bad----its almost 20yrs. Crank, spark, fuel pressure - But no Injector Pulse? Hi guys, Recently had my 90adm with 92 GenII 3SGTE at a shop getting clutch, timing belt, waterpump, turbo - so the engine came out. A bad pip sensor will cause all the injectors not to fire and you will have no spark. Compression, and fuel pressure good. Have helper crank the engine to see if the nylon fuel line sprays fuel. ECM check fine. I also have no injector pulse, no power, not clicking. I have tested every wire and went through the vortex Buick no start tree. Now it cranks but no injector pulse no spark and only fuel delivery on prime up. this is on a rb25 s2 so it has an internal ignitor. The TSI engine (like many modern engines) uses direct injection, which places the fuel injector in the cylinder or combustion chamber. I don't see any mention in the service manual saying that this car has any sort of a crankshaft position sensor. New injectors. I am working on a 2005 Eclipse GS (4cyl) (July 2004 production date) and we installed an Evo turbo setup, WRX injectors, Walbro 255, etc. you may be getting pressure but no volume from the fuel pumpsounds weird but they are 2 different things. The spark is fine, i'm getting a good RPM signal, there's power at the injectors and the injectors are enabled. Have you checked for any DTC's. Damaged resistors would likely come from trying to drive coil primary directly with non-direct drive coil outputs - this is a fairly common mistake that new users make. 00+ computer without being 100% sure that's what it is. Unless I am very unluckyI've got to think that at least 1, if not all 3, of these modules are good. No spark, no injector pulse Working on a factory 2004 Isuzu asender with the 5. And caps are good on ecu. Now it cranks, but won't start. 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. Any thoughts? BB. Checked all grounds and they also look good. 7, I have good fuel pressure and good spark but I am only getting 0. Discussion in '1st Gen Tundras (2000-2006)' started by Toytundra2000, Denso (3297) SK20R11 Iridium Spark Plug, Pack of 1 $8. Not unusual for a Ford coil pack to lose one cylinder. 8 people found this helpful. What I do not have is the ground pulse to fire the injectors. 8 ohms -12V to the pink injector wire - each ground wire is good - ran a test light between the two terminals on multiple injectors and cranked the engine for 10-15 seconds. Working on a Ford Probe GT. 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. 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. Engine won't start (new rebuild), it has spark (new opti and coil) but I do not think the injectors are firing. If it isn’t, check the following: NO FUEL PRESSURE: Check the relay. Hi Guys, I´m helping a buddy with his 1995 Corolla. No Injector pulse Sign in to follow this. With a voltmeter or test light Remove plug wire and check for spark while cranking. I thought it might be the ECU, but I swapped them out and it still does the same thing, cranks but won't start. 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. The fuel pump is good. Spark and injector signal. I'm just wondering if anybody has encountered this. Now it cranks but no injector pulse no spark and only fuel delivery on prime up. now i had a look at another one of my vehicles which has l76 6. Using the cranking taper to "sweep" the pulse width can make getting the exact cranking pulse width setting less critical and result in faster starts. All grounds check OK. Have someone crank the engine--but, hold the plug with a rag so as not to shock you through the plug wire. Battery voltage 12. Any suggestions? Thanks! 05-09-2010, 03:10 PM #2: RP80242GT+T. it has no injector pulse and i cannot verify the culprit for the life of me. I'm working on my son's 91 S15 with the tech 4 in it. 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. This could cause no spark or fuel. Injector test mode sets up a specific injector pulse width, duty cycle, and an adjustable commanded number of pulses. have spark and fuel pressure. Click to expand I thought that the ecu should be putting out 12v at the pins with the ignition on that’s what everyone on here has said. Still no spark, still no injector fire on num 2 cylinder 12-07-2017 #13. Car will run if spray fuel into intake. The fuel injectors are energized when their solenoids are energized (by applying a pulsed ground signal) by the ECU. I didn't check for pulse on injectors but assumed they were not operating because i did have fuel pressure available. 1998 buick regal, will die at times, when trying to restart the engine has no spark from coils and no injector pulse, also the fuel pump runs with key on, it wont turn off until you turn off the key--…. Car question: My Grand Caravan SE suddenly died while driving and phoning around, automotive garages are asking too much to have it fixed. Now on the way home, the first time in a long time, the car had no problems reving over 5K. Just looking for some final input before I go wasting money on random components. 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. 95 cavalier 2. 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. I ALREADY SEARCHED THE ARCHIVES, SO DON'T BOTHER TELLING ME TO DO SO. Engine won't start (new rebuild), it has spark (new opti and coil) but I do not think the injectors are firing. 3 no spark or injector pulse \015 I have no rpm input on scan tool. The car has a new crank sensor recently installed ran well for a while and now has no injector pulse. I have spark and fuel pressure but still no injector pulse. No fuel injector pulses from the fuel injector connectors as tested using a Noid Light. XH Ute no spark no injector pulse - Ford Modifications Website. Fuel pressure good. When the throttle is. I'm hoping it's crank sensor related but wasn't sure. unhooked an injector plug and put the wire in from the light assembly and the light doesnt flashi was thinking i could use it as a cheap noid light, but i guess not or the injectors arent getting a pulse. If the sensor is bad then the injectors won't turn on and there will be no spark. Fire at the plugs or the injectors and the fuel pump would run all the time, I replaced the motor with another that came out of the same year model and replaced every sensor from that car to mine, even the ECM, tried to start and it will not, still no fire at the injectors and fuel pump is still running, if any one can help please, I need it. it will start for a sec from the cold start valve but i have no injector pulse i have power to everything including injectors and wire harness is good because i can get both banks of injectors to turn on by grounding out the pins that would connect to the ecu i do have spark, and thought the problem was my ecu. Benefits include smoother idle, 1. How to test for proper fuel injector control and how to test fuel pressure and the fuel pump electrical system. In addition to any parameters of special interest, all data should be logged to disk. I have a 1990 F350 crew cab that I recently bought cheap needing a transmission. Checked for spark. 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 own an auto repair shop, but don't have any info on this system. The cars battery went completely dead and is now stuck in valet mode if that makes any difference. Grounds for all sensors. Here is the checklist: Painless wiring harness. Ive got a fully charged battery and a jumper on it, it just cranks and cranks. This is an issue with a '95 LT1. On a lot of these vehicles the ignition module sends the signal to the Crank position sensor. Joined Feb 28, 2010 · 17 Posts. 1998 buick regal, will die at times, when trying to restart the engine has no spark from coils and no injector pulse, also the fuel pump runs with key on, it wont turn off until you turn off the key--…. 4 ms Technician A says that the cylinder head and piston design of a GDI engine is the same as in a port injected engine. If an injector, or injectors, are not on spec, the ECU will attempt to correct flow delivery via altering injector pulse, but it cannot correct the faulty injector(s). Joined Dec 26, 2013 · 108 Posts. The result will be the same, no injection pulse. 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. replaced ignition module and crank angle sensor still no spark. 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 purchased the car and had heads rebuilt installed with new gaskets and all surfaces machined. For low-impedance injectors (less than 3 Ohms), you need to limit the current to avoid over heating the injectors. We stopped 2 miles from home and yep, the car died again. no spark,but have injector pulse,12v to coil, At some point during the month of August the Roadfly forums are going to become archive only. I have a no start condition. So, low compression or an ignition problem should be eliminated before looking for a possible clogged fuel injector. 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). While testing and diagnosing, we have an incandescent bulb (tail light socket and pigtail) connected to the injector pigtail. No Spark - Repair ignition system. I have changed the distributor cap, rotor, plugs, wires, crankshaft positioning sensor, and the pcm. Rewq246 · Registered. You can keep your original and have this one as a spare. after about 3 minutes still no pulse, just a solid light. I have a feeling that my problem lies elsewhere. greetings Truck came to the shop, e38 standalone wiring show no no spark nor injector pulsewidth Think it was the VATS, tried another ECM from a swap that works and it doenot start. But injectors pulse works off of ground from ecmyou have to have the grounds at thermostat and intake or will not pulse injectors. 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. Crank, spark, fuel pressure - But no Injector Pulse? Hi guys, Recently had my 90adm with 92 GenII 3SGTE at a shop getting clutch, timing belt, waterpump, turbo - so the engine came out. i do have power to the injectors but no ground pulse i checked all the fuses and fusible links and all seem. Basically i have no spark, no injector pulse, no start. Hello I am a newbee here but worked on Chevy's my entire life. long story - Bad couple of weeks for my S6. I still don't have injector pulse and I'm really leaning towards the injector harness itself. I have no injector pulse. my email is [email protected] 1995 Honda Odyssey. Could the UTEC have tripped something causing the injectors not to pulse?. This is in my 69 Camaro with AAW Classic Update harness. 0l gen 4, with the engine not running the map sensor reads 102kpa, during cranking you can see is decreasing as the engine starts to pull a vacuum. No fuel injector pulse I have a 90 SC 5sp The harmonic balancer broke so I pulled the engine to fix that and multiple other small issues. It has spark but no injector pulse, it's getting voltage to the injector connector but the PCM is not grounding the injector for the pulse. There was no spark or injector pulses when it was time for start up. Removed ecm and inspected just incase a bad cap or anything obvious. It is a VU with an L67 fitted. We have just finished rebuilding both engines and reinstalled in the boat, Now we seem to have no injector pulse on eather engine. installed my new motor today and have no pulse. Re: 2002 f150 no spark or injector pulse Post by tater69 » Sun Oct 04, 2015 4:36 pm so from what i have been looking at that is the cruise control cut off switch would that going bad cause the truck not to start. 0 and im getting no injector pulse. All fuses are good. We have spark, but no injector pulse. 2/4/5 no injector firing, but 4 doesn't have spark either. still no pulse at the injectors. no injector pulse. Replaced cas, please someone help with where I go from here its a 92 dodge rt TT. The names seem backwards though, for the auxiliary injector is used all the time and the main injector comes in under light to heavy load conditions. Just looking for some final input before I go wasting money on random components. Anyone know how to back probe injector wires going into PCM to determine if there is power at the PCM or not? If power- bad PCM injector driver/ if no power open circuit to PCM. ive tried 2 different wiring harnesses. 2001 saab 9-5 starts then stalls, no injector pulse. No Injector pulse Sign in to follow this. One of the guys that i meet, he told me that might be a distributor problem. My friend has my hp tuners, so I won't be able to scan it until tomorrow. Please right click on the image and save the pic. i know the older gm's like this the module controlled spark and fuel. Discussion Starter • #1 • Aug 13, 2013. No Spark No injector pulse where to look I just swapped in a new motor and put on top a KB 2. My next thing to try is the crankshaft position sensor. Steady spark on all 4 plug wires (after 4 or 5 revolutions). If you want a guaranteed non-immobilizer ECM, use a 4-plug 1997 ECM or have the immobilizer EEPROM chip erased in yours. no codes set. Engine cranks fine and fuel pump runs. Here is what I have tested and the results: -All the injectors read about 12. Typically the signal across the fuel injectors are monitored by a scope (train of pulses). Hence with a weak PIP signal, and the SPOUT in, you could get spark but no injector pulse. 2002 nissan sentra 1. Your next step is to verify fuel pressure and that the PCM is activating the fuel injectors with a Noid Light. Just got the motor in and ready to fire but it has no spark or injector pulse. Replaced distributor five months ago. No spark or injector pulse; No spark or injector pulse (1997 Ford F-150) no fire or pulse. 0 and later code has a cranking taper curve. Im wondering what is a safe range to change and can you move the peak around a little bit in order to help mpg? or do you have to leave it at the stock location?. Pulled the rear plug to see if it was wet from fuel. 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. It always cranks but not start when cold. No spark, no injector pulse Working on a factory 2004 Isuzu asender with the 5. 4 volts to the no. any saab gurues out their. On my 97 Deville the display is showing Theft System/car may not restart. 2nd Gen Ram Tech - no injector pulse - ok, i have about had it with this truck and its issues since i bought it. ordered ecm programmed to my vin # installed and performed passlock reprogram. But those damned fuel injectors just won't open on their own. 3t out of a turbo Coupe well one day I was driving the car I pulled into the shop and turned the car off I came back out 4 hrs later and the car wouldn't start well I have fooled and fooled with the car now trying to figure. is the car throwing a spark?. Engine cranks fine and fuel pump runs. I hooked up a fuel pressure gage and it is perfect. The distributor problem and associated lack of spark did not show in the codes when I ran them. That is, the 12 volt supply. 9L no start. That will cost you a lot of wasted money. you may be getting pressure but no volume from the fuel pumpsounds weird but they are 2 different things. No trouble codes. Typical No Spark, No fuel thread here. Checked for injector pulse and I dont seem to I have a 1995 ford taurus with 83 500 miles when in hot weather the no_injector_pulse - DIY Car Doctor if there is no spark as well as no injector pulse, Generic DTCs GM Cars DTCs GM Truck DTCs Ford DTCs Ford Trucks Part 1 -How to Test the Crank Sensor (Ford 3. I have changed the distributor cap, rotor, plugs, wires, crankshaft positioning sensor, and the pcm. Spark then means the crank signal is working and most likely it would be the injector drivers (pcm) or pcm grounds. Since that post I have wired in a different harness and checked all powers and grounds and I see no problem. I'm working on my son's 91 S15 with the tech 4 in it. No Start 1: Checking For Spark If your Nissan is suffering a cranks but does not start condition, my suggestion to you is to start by checking the ignition system. No pick-up coil input, no spark or injector pulse. My friend has my hp tuners, so I won't be able to scan it until tomorrow. That's a whole different PCM there. im getting solid fuel pressure and spark (fires great with starting fluid). We stopped 2 miles from home and yep, the car died again. Tach in +12V via two wires, one ignition power, one main. It has spark but no injector pulse, it's getting voltage to the injector connector but the PCM is not grounding the injector for the pulse. It includes wiring harness adapter and instructions. I have a 1992 Mazda 323 SE. So, low compression or an ignition problem should be eliminated before looking for a possible clogged fuel injector. Sign in to reply. As the engine heats up the sensor goes open circuit and there is no pulse to trigger the spark or the injectors. I picked it up from a salvage yard in Wisconsin. cant go through my senior year without a car. Just got the motor in and ready to fire but it has no spark or injector pulse. Also, no power to the fuel pump. Visitor in New Albany, This could cause no spark or fuel. please I need help. 5 milliseconds for EFI cars. Fuel pump is providing good pressure. Checked all 4 injectors with DVOM, threshold I believe is 13. There was no spark or injector pulses when it was time for start up. As for the idle control valve, if the valve were completely closed, the engine may not start. any saab gurues out their. 95 cavalier 2. The owner switched the ignition module over to tbe 86-87 module. 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. NO spark or injector pulse. i find out, the fuel injector didnt spark any fuel at all. The other thing to look at is how big of a pulse are you commanding. Won't start on starting fluid either. 00+ computer without being 100% sure that's what it is. the interior swap harness is a hybrid one that came out of a running k swapped car, along with the aem ems. Built many a motor but this newer stuff eats my lunch. When the throttle is. If worse gets to worse, may send it to Dealer and let them figure out if ECU is bad. As you let go of the key and return it to the run position, the injectors give one squirt. im getting solid fuel pressure and spark (fires great with starting fluid). I'm hoping it's crank sensor related but wasn't sure. Verified good fuel pressure at the rail, verified spark. This morning, using module #1, I cranked the engine while someone wiggled the ign module connectornothing happened. The PCM is from a 98 Buick Regal GS. Mercruiser 4. The coversion has taken over a year. If that harness has become disconnected somehow, the ECM will not have a pulse reference from the distributor in order to fire the injectors. The vehicle was towed to the shop (obviously) and had no injector pulse. Troubleshooting a No Start, No Spark, No Fuel, No Com (any car) - Duration: 52:08. I still don't have injector pulse and I'm really leaning towards the injector harness itself. 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. replaced main relay, check fuses all good put new distributor and still no spark and no injector pulse. I have a cam code even after swapping with a good sensor, I have not compleatly tested the ground wire going to the PCM but I was thinking maby the cAmshaft sprocket is different due to the crank sprocket. bad injector,. By Quick Strike in forum 2003 - 2004 SVT Mustang Cobra Replies: 2. bith of which are known for going bad on 5. constant reading on injector conectors is good but no pulse reading when starting. 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. I have voltage to both poles on the. Registered: 15 Feb 2012. i blew head gasket on old motor so put new/used motor in, same 4. No Spark/Injector Pulse. 0 have spark & fuel Runs on starting fluid but no injector pulse i have 12 volt at injector harness but no ground pulse did u ck yiur eec relay hotpops is offline. 1994 - 1995 Specific Tech: 3: Mar 12, 2010: injectors/ spark plugs: Fox 5. hey guys iv been having this problem, after changing the headgasket car wont run. No injector pulse TBI. Replaced crank sensor, checked voltage at crank and cam sensors, took apart tipm (fuse box) and checked connections, checked all relays. After repairing both harnesses the vehicle will no longer start, and has no injector pulse, but it does have spark. Diagnosing a clogged injector is not always easy because the symptoms act similar to low compression or an ignition problem, such as a bad ignition coil, a broken spark plug wire, a bad spark plug, etc. There is no fuel output while cranking. New injectors. I have run ecu test and it comes up all ok. So, the engine has been sitting in the car for that period of time without running. 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. He recently put a new engine in and the car is not starting. Have checked resistance/voltage on injector end of looms and all is normal as well when the car will not start. getting spark, getting fuel to the fuel rail, have reset my ecu. Hello to all I need help! I have 2005 nissan maxima SE 3. Quote; Post by lilskyline240 » Sat Apr 05, 2008 9:00 am. 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. This information may not apply to all makes and models. But just to be sure I took my dizz apart and tested it and its fine( should be since its new but you never know) when i have the stock 97 ECm hook'd up it shows no. When you turn the key, the injectors do not pulse. Author: Subject: No spark or injector pulse: samuel. No crank start after clearing. View Profile View Forum Posts Private Message. Fixed that and still nothing. i do have power to the injectors but no ground pulse i checked all the fuses and fusible links and all seem. P0336: Inconsistent Crank Sensor Signal Detected. Purchased new set of stock fuel injectors and replaced. This is in my 69 Camaro with AAW Classic Update harness. I have tested every wire and went through the vortex Buick no start tree. Checked codes and got crank cam and O2 sensor. Go to: No Start 2: Checking Fuel. Hi guys I have a ve ss and have no injector pulse. 1994 - 1995 Specific Tech: 3: Mar 12, 2010: injectors/ spark plugs: Fox 5. Hence with a weak PIP signal, and the SPOUT in, you could get spark but no injector pulse. If you have fuel pressure, spark and no TBI pulse, the cheapest and most likely thing to go bad is the ignition module. This is where I would start. I've tried everything I know to do and no injector pulse. 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. How to check fuel injector pulse using a noid light This is a awesome test because it can be done very fast using a very inexpensive tool called a Noid light. If I bypass the fuel pump relay I get constant fuel flow but no spark or pulse. Remove one and only one fuel injector nylon tube from it's place on the intake manifold. 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. 8 swap in a corrado but i figured the situation applies to a standard 24v as well. 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. Any ideas on what to try next? Im lost! Thanks in advance. So engine has spark, injector pulse is there but something is still not right. This allows full voltage to the injectors throughout the pulse widths. Basically i have no spark, no injector pulse, no start. Audi Original "S" Cars - No spark, no fuel injector pulse, no start. pickup coil. Topic Viewing 12 replies - 1 through 12 (of 12 total) Author. i replaced cranks sensor, ignition module, computer, an the coil assemblies. But those damned fuel injectors just won't open on their own. Module is in good. You must make an adapter or test with needle adapters while the injector is hooked up. Spark, no fuel pulse. 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. My 91 940T has injector pulse, no spark. By having full spark from the coil and full spark at the plug wires coupled with 12 volts on either side of the coil and to the TFI run and start wire, I think the spark side of the equation is fine. Lack of injector would not cause backfire and pops but erratic spark would. I have spark and fuel pressure but still no injector pulse. 9 Gas; when it was delivered to me it ran but needed an intake gasket let is sit for a while and now it won't start, no injector pulse, no spark verified the computer was good (swapped it into a different truck) moved on to the cam position sensor. We have narrowed it down to the fact that there is no injector pulse but cant seem to figure out the biggest question- WHY?!!?. Re: Vt V6 no injector pulse has spark by immortality » Fri Jul 05, 2019 8:17 am Try the DFI if you have a spare as the DFI controls the timing when cranking until the engine hits 400rpm (IIRC) and then the PCM takes over control of the ignition timing. 1 MS55 - 3 TA47 - 1 MS123 - 1 YR21(SR21) - 1 RX80 - 1 ST165 - 1 JZS160. ( if it shows no pulses cranking , then the ECU is bad or the ECU thinks there is no spark or the TPS is signaling WOT , full time). WTH! then checked to see if injectors are working. I have spark at the plug, fuel at the rail, injector pulse, no code from the OBD1, the Fuel Cutoff Light is on. it has power to injectors but no ground pulse. You can use a noid light to see if your getting a pulse. I still get no spark or injector pulse while turning it by hand v. I check the voltage coming from the Crank position sensor while cranking and its read. Traced it to no spark and no injector pulse when the trouble occurs. The injectors need to be unplugged when you check pulse at the ecu, also your looking for a ground pulse not a positive voltage pulse. The owner switched the ignition module over to tbe 86-87 module. ive tried 2 different wiring harnesses. Joined Jun 19, 2006 · 3,923 Posts. We are getting an intermittent pulse on injector and coils. New rebuilt engine. Plenty of spark under crank position. Have helper crank the engine to see if the nylon fuel line sprays fuel. greetings Truck came to the shop, e38 standalone wiring show no no spark nor injector pulsewidth Think it was the VATS, tried another ECM from a swap that works and it doenot start. In case of that, there is no injector pulse or spark, this means that is your ECU. Use the NOID to check for injector pulse when cranking. 8 swap in a corrado but i figured the situation applies to a standard 24v as well. 1G 1g no start, has spark no injector pulse Posted by 90tsi6bolt, Sep 1, 2018. no injector pulse? - posted in All Things V6: I looked at cranks but wont start, mine is a little different, I have good fuel pressure good spark, but no injector pulse. Is the crank shaft position sensor signal reaching the ECM? you need to also check that the ECM is sending injector pulse signals, the only way to do this is take it to. 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. TFI Module is the ignition control module. Fuel injectors are usually powered directly by a fuse and then grounded by the engine computer. 3L cranks but no run no spark no injector pulse new member, truck was pawn off on me. They we're able to manually get spark and injector pulse by pulsing them with equipment they have. Registered: 15 Feb 2012. If fuel is still not spraying go to fuel system troubleshooting before. Good compression , done 90,000 Miles. 2 used to be hooked up and ran fine. Now it cranks, but won't start. It has no injector pulse , but does have spark , although I guess it may be firing at the wrong time , coz the introduction of aerostart {ether} does nothing. The ECU cannot pulse the injector without an Ne signal and will not start or run if this signal is not present. A short in the dash powerside wiring (the small orange/black wire) caused a no start problem The dash light wiring has been repaired Symptoms: No spark from coil No injector pulse Fuel pump primes but not running during cranking Intermittent Voltage gauge operation Tachometer not working Diagnostics:. No - Remove one of the injector connectors from an injector. Another way to test the injector is to measure the resistance of every injector between the two terminals and compare it with the highest and lowest values stated in the injector datasheet; if the result outside the allowable boundaries, then change this injector. This would be a pickup inside the distributor and or ignition module. But it will not start. right now please help. 8t coil conversion. Have checked resistance/voltage on injector end of looms and all is normal as well when the car will not start. Replaced ignition because I knew the wires in it were bad and is fine now. It started with a spray of fuel to the air intake. skjsming · Registered. Eventually find no injector pulse. General Diagnosis. i blew head gasket on old motor so put new/used motor in, same 4. When I push switch, injectors spray like crazy. 3t out of a turbo Coupe well one day I was driving the car I pulled into the shop and turned the car off I came back out 4 hrs later and the car wouldn't start well I have fooled and fooled with the car now trying to figure. Noid light confirms and voltmeter shows 12v so ground issue is what I'm at. Re: no spark no injector pulse Don, i checked with a noid light and there is fuel pressure. Other times it starts right up. Just replaced fuel pump and filter. The PIP sensor supplies the timing pulse to trigger the TFI and injectors. 1997 - 2003 F150 - No spark, no injector pulse! What's up? - Hi Everyone, I've got a 2001 4. 2 ohms,all 4 were within that range. - the ECU ground wires are not not connected to a suitable ground. Replaced the crank sensor and the engine control relay with an OEX unit from Ashdown's. 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 own an auto repair shop, but don't have any info on this system. ANd i take the injector out and test it, It spark fuel. wtf causes this?. constant reading on injector conectors is good but no pulse reading when starting. 30 psi sounds a little low. So I went in and tested the pins directly at the ecu by probing The injector output pins 51,52,60, and 61. now i had a look at another one of my vehicles which has l76 6. If I bypass the fuel pump relay I get constant fuel flow but no spark or pulse. Still nothing. I also have cranked the car over with the cas out and Tryed to spin the cas by hand. Looking for abbreviations of IPW? Indirect measurements of injector fouling such as injector pulse width (IPW) Spark-Ignited Engines. 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. When I push switch, injectors spray like crazy. Next i checked for spark using a spark tester then spray carb cleaner in the Tb and it starts up long enough to burn off the cleaner. I've even pulled fuel rail and hooked up a momentary switch to injectors going to ground. There is no fuel pressure sensor that I recall on an 1150. 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. We have just finished rebuilding both engines and reinstalled in the boat, Now we seem to have no injector pulse on eather engine. ZippuDoozy · Registered. Jump to Latest Follow 1 - 2 of 2 Posts. No injector pulse is usually a PIP problem. If the ECU shows no change in the MAP voltage while cranking it won't pulse the injectors. I went through the wire job on the new module and found out he had the crank signal and ground wires backwards. In relation to your no injector pulse problem, check the wiring harness from the distributor to the ECM. Post by auto authority » Thu Dec 08, 2011 3:55 pm has to be in your wiring of the ecu. 1994 - 1995 Specific Tech: 3: Mar 12, 2010: injectors/ spark plugs: Fox 5. I have a 1990 1500 with no injector pulse. Any ideas on what to try next? Im lost! Thanks in advance. I didn't check for pulse on injectors but assumed they were not operating because i did have fuel pressure available. 08-20-2010, 01:14 PM. I replaced the whole engine harness, and voilà , it now had both spark and injector pulse. Well i found what was causing my engine control fuse to blow. On key on, the fuel. The engine has only 5,000 miles on it. Your next step is to verify fuel pressure and that the PCM is activating the fuel injectors with a Noid Light. I've tried everything I know to do and no injector pulse.