Question about 1995 GMC Sierra

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No spark but turns over replaced ignition module,coil,ecm

I have 1995 gmc 1/2 ton with a 350 tbi i have replaced the ignition module,computer,coil and still no spark.has fuel going to throttle body

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  • tguzz_12 Apr 19, 2009

    thanks for the thought,but i am told that my truck does not have one

  • joe joe Jun 10, 2013

    i have no spark replaced ign coil, distrb routor, checked all coils, and module,and steel no spark

  • Anonymous Mar 30, 2014

    coils has no power

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Could be in the crank position sensor

just a thought shack

Posted on Apr 18, 2009

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94 gmc c1500 4.3 no start, engine turns over, got gas but don't have. everything in thge ignition is new, got power at the coil


Place a spark plug tester in your number #1 ignition lead and confirm spark.- No spark = possible ignition module failure if spark from coil is present.

Test the fuel line pressure for 12 PSI.for throttle body fuel injection systems on 1987 to 1995 - If reading is low replace fuel pump. If reading is zero lbs check relay.

Compression test for acceptable compression.

If you have spark, fuel and compression, static time the engine and try again to start the vehicle.

PS: If your vehicle is a standard shift you have a clutch safety switch and a column mounted ignition switch that should also be considered.

Here is some more info that may help:


How to Test the Fuel Pump on GM TBI Fuel Systems How To Check Engine Compression GM 3 5L 4 2L

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Error Code P0351 for a 2005 Toyota Avalon


Possible causes
Faulty Ignition Coil 1
Ignition Coil 1 harness is open or shorted
Ignition Coil 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

What does this mean? When is the code detected? Each ignition circuit is continuously monitored by the Engine Control Module (ECM). The test fails when the ECM does not receive a valid pulse signal from the ignition coil. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Lack/Loss of Power Engine may be harder to start Engine hesitation Rough engine idle P0351 TOYOTA Description: The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.

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I have a 1987 chevy S10 4x4 xcab pickup . it just died one day i rebiult the TBI and put a new computer in it and new coil in . Have checked all the fuses . and it will not start .do you know what i


Check if you have spark (coil or ignition problem) Next consider what you did when rebuilding the TBI as there may be parts that will only operate in one way or settings that have to be adjusted. Lastly is the new ECM compatible with the system (immobiliser) Use a scanner to reset the ecm program

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1 Answer

On my 95 gmc pu, i,m having problems with the engine all of a sudden shutting down. i have replaced the MAP sensor and


You didn't say what engine size, but no matter for me. That sounds like the ignition control module-about the size of a matchbook, and 4 or 5 wires to it. GM often put them in the base of the distributor.
The PCM controls spark timing by signaling to the ignition control module. This module controls the ignition coil, it cuts the primary current to the coil (when the pcm signals it), so that high voltage spark is generated from the coil.

Jun 11, 2014 | 1995 GMC Sierra C1500

2 Answers

Spark chevy tbi


Down deep in the distributor there is a pickup coil did anyone check or replace it ? I find its easier to pull the distributor but mark position first.. then replace the pickup coil in the distributor.. that's about last thing to replace sounds like you have done the others.

Apr 07, 2014 | 1995 Chevrolet C1500

1 Answer

Chevy c1500 no spark


I agree, the ECM

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350 with TBI intermittent injector pulsing


this could be a bad ingnition module or a loose wire. but i think on this truck the injectors do get singnal from the ecm

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I have A 1991 GMC SIERRA, 350,no fuel no spark, have fuel to the tbi, changed coil, ignition module, tested pick up coil good, check engine light comes on with key, fuses good. I'm running out of ideas....


Do you have power to the injectors? One of the wires to the injector will come on for a couple seconds as soon as you turn the key to the on position.The computer controls the ground side. If you do not get power to one of them start looking for an open circuit. The same power source will also go to your ignition coil and ignition module. If you do not have power on the pink wire to the coil apply a temporary fused battery power source to it and give it a try, this will also power up the injectors.
Check it out and let me know.

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1995 montero 3.0 no spark on coil #3


check the jack pins condition, check for brakes, check the harnhes for broken wires, try an other ecm from a junked or salvage or borrowed and see if it makes any difference

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HELP! I have a 95 gmc 4x4... sank it underwater. replaced fuel pump assembly, distributer cap, rotor, and spark module,ignition switch, computer, fuel pump relay, plugs, and wires. had only 80 psi...


the starter could be too close to the flywheel. try adding a couple of starter shims. it also could be drawing to many amps from internal corrosion from water intrusion.

May 07, 2009 | 1995 GMC Sierra C1500

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