Question about 1997 Volvo 850

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Vehicle has no spark or injector pulse-have already replaced coil & module

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The only thing i can think that kills both spark and injector pulse is the computer

Posted on Oct 01, 2009

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92 chevy silverado truck will ecm" not let engine fire


If it has an ignition module and fuel injectors than absolutely.

Normally it is either missing spark but has injector pulse, this would typically be a bad ignition module or coil.

If it is missing both spark and injector pulse it is more likely a pickup coil in the distributor.

Jan 22, 2016 | Cars & Trucks

1 Answer

What will shut down the coil pulse from ecu but still have injector pulse,idle control module ??


Don't dismiss the coil pack completely. The hi voltage side of the pack is what usually fails.

Dec 14, 2014 | 2006 Hyundai Getz 1.6

1 Answer

I have no spark I've done everything I can think of but can't get spark? ??


You checked for spark--- how?

You have a good battery--- you tested?

You have checked for OBD Codes?

You do not have any vehicle shown

No motor,no real problem with details
& test results

Do you have injector pulse or at least hear them click,
while cranking the motor

Checked ALL Vehicle fuses & fuseable links

Do you have voltage to primary side of ignition coils
or module with key on

Do you have wiring diagrams, so you can actually do some testing

Do you have 12.6 volts at battery static

Aug 17, 2014 | Cars & Trucks

2 Answers

06 gmc 4.3 liter cranks over will not start no fire starting fluid did not effect condition


check that the cam shaft is turning ( broken belt/ chain. check that the immobiliser is operational

Feb 02, 2014 | 2006 GMC Sierra

1 Answer

Pickup coil


Hi sugriva 108,

I saw your comment on one of my other posts;
http://www.fixya.com/cars/t12417950-93_s10_2_8_just_shut_off_woulnt_start?eventid=21761548

yes, if you have battery power at the injector, but when you check for "pulse" from the computer on the ground side of the injector and the test light does not blink, the most common problem is a failed distributor module.
The pick-up coil in the distributor can cause the same symptom. It is the pickup coil that the injector and spark control signals originate from it is connected directly to the distributor module. The module is what sends the signal to the ecm for fuel control and timing advance and also pulses the ignition coil. Some people call the distributor module the "ignition control module". However, it affects fuel as well as ignition, which is why I refer to it as simply the "distributor module".

If the module is bad, you can replace only the distributor module. If the pickup coil is bad, you will either have to disassemble the entire distributor to replace the coil (the hard way) or you can simply buy a remanufactured distributor. It is less expensive to replace only the coil, but the coils usually go bad as a result of worn distributor bushings and it is usually more trouble than it is worth by the time you get everything right.

If you have lots of time to work with me and do some electrical testing, I can help you determine if it is the module or the coil. However, if you just want to get your vehicle running as fast as possible, the easiest and quickest way is to go ahead and get a remanufactured distributor and be done with it. They are not real expensive. AutoZone lists the distributor for your vehicle for under $100 (click link below)
http://www.autozone.com/autozone/parts/Cardone-Reman-Distributor/1993-Chevrolet-S10-P-U-2WD/_/N-izmhuZ93xku?itemIdentifier=765107_0_0_

May 09, 2012 | Cars & Trucks

2 Answers

I have a 2002 GMC Savana Cargo van, it ran fine until 1 day I when to start it and it won't start, it's getting gas but no spark, what should i check first.


The manufacturer does not even publish a troubleshooting chart for this. (At least, not a chart that is not associated with a computer fault code)

Most of the things that will cause your vehicle to not have spark will also cause your engine to not receive fuel. (no injector pulse) The only things I can think of would be a bad ignition coil, or a bad distributor cap and/or rotor, or a bad ignition control module. Depending which engine your van is equipped with, there should be an ignition control module located near the ignition coil. I would check for spark at the coil. If there is spark at the coil and no spark at the plugs, replace you cap and rotor.
If there is no spark at the coil, it could be caused by several things, but if you are certain that you have injector pulse, the most likely would be the module. (coil failures do happen but are more rare)

Jan 30, 2011 | 2000 GMC Savana

2 Answers

1996 Jeep Grand Cherokee No Start


I would be thinking that there is a good chance that you need to be checking out replacing the computer, if you aren't getting any communication with the proper scan tool then the computer isn't communicating with anything in the vehicle...... I would have guessed first off that the ignition control module might be bad but that is obviously part of the computer also, I would be looking in that direction.

Sep 19, 2009 | 1996 Jeep Grand Cherokee

1 Answer

1990 gmc 6500 topkick with no spark or injector pulse. all 4 wires on the ignition coil have battery voltage with key on. is coil shorted or is the ignition module bad?


You are jumping to conclusions. Slow down.
No spark AND no injector pulse indicates none of the desired outputs were triggered. The ignition module makes spark when it receives a crankshaft position sensor signal, and then transfers control of that spark to the computer after it starts. The module takes its crank sensor signal and generates an RPM count that it forwards to the PCM(main computer) which is used for triggering the injectors and controlling timing. SO, if you had a bad crank sensor OR a bad ignition module, you could lose both spark AND fuel. a coil would not disable injector pulse. modules RARELY fail in a manner that disables RPM reference to the computer causing it to not fire the injectors...At this point, I would TEST the crank sensor as the next step. If its easier, 1 of the wires on the module goes directly there so you can test the crank sensor at the module.

Sep 18, 2009 | 1990 GMC K3500

2 Answers

No injection pulse


looking at the schematics, well the PCM controls the pulse width to the injectors , BUT , there is a injector coil fuse , its #2 in your kick panel fuse box , a 20 amp , check it , sure hope that fix ya . that would be sweet .

J5

Jan 15, 2009 | 1992 Buick Century

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