My 1993 vette shuts off while running, I NEED HELP PLEASE
10-09-2011, 08:45 PM
#1
Heel & Toe
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My 1993 vette shuts off while running, I NEED HELP PLEASE
Few weeks ago, my car started to shut off in the middle of the road and then after few minutes it starts up again then quickly dies, i can start the car after few hours after engine cools down, I recently changed fuel pump, new opti spark, new fuel filter, new ignition coil , also new ignition module, my battery alternator and starter also in good shape, I need help please, what should i do, It cranks but no spark, spark plugs are new as well, so please help me out
10-09-2011, 09:24 PM
#3
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Well i was checking it out when my friend tried to start then engine, i saw no spark, after few hours i repeated this and magically i saw spark and my car fired up, now I m totally lost with this, how can i Check for PCM codes? Thanks for your help
10-09-2011, 09:51 PM
#4
Le Mans Master
This sure sounds like a bad "Ignition control module".. This is the way they act when going bad..If you don't use the dielectric grease on the back of the module when putting it in they can go bad real fast....WW
10-09-2011, 09:53 PM
#5
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Actually I did all the correct procedure in changing ICM and IC and i used the grease that came with the ICM, that why i m confused because I changed many parts, my last guess will be Ignition Switch
10-09-2011, 09:58 PM
#6
Drifting
A real cheap diagnostic aid is a can of "freeze Spray" from Radio Shack. It's a can that sprays icy cold mist that doesn't hurt electronics. The next time it stops, spray some of the freeze spray on the ICM. That will immediately cool it down and see if it starts.
Your problem does sound like a bad (overheated) ICM. That's a classic symptom. I know it's new but stranger things have happened.
Your problem does sound like a bad (overheated) ICM. That's a classic symptom. I know it's new but stranger things have happened.
10-10-2011, 06:14 PM
#7
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But my ICM is new, i think ill give this a shot, but ill keep u guys updated with changes, i called chevy dealership and they said it might be fuel injector i think might not be the case but who knows, please any additional info will be helpful
10-15-2011, 08:01 PM
#8
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Update on my car status: I got computer reading on my car, first, no check engine light when car shuts off, secondly it says 1,2 fuel injector fault, I m still trying to figure this out
10-15-2011, 08:30 PM
#9
Drifting
Don't forget that although your ICM is new that a partially shorted coil can be putting a strain on it's electronics and making it heat up. That's why I suggested the freeze spray. It's a real cheap diagnostic aid.
10-17-2011, 04:20 PM
#10
Le Mans Master
You need the factory service manual and follow the troubleshooting procedures within it.
Could be anything from the wiring harness to the coil/ICM to the opti to the ECM
Could be anything from the wiring harness to the coil/ICM to the opti to the ECM
10-18-2011, 02:57 PM
#11
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I had the exact same issue with my 1996 Saturn SL2, different cars but the same problem. I took it to a mechanic and they said it was the Ignition module, replaced it and the problem still existed. It turned out the problem was a broken crankshaft position sensor, $15 and an hour under the car later the problem was solved. Even if this doesn't solve your problem its cheap and easy, no reason not to give it a shot. Good Luck
10-19-2011, 09:42 AM
#12
Le Mans Master
no crankshaft position sensor on the 93 
If you have followed thru all the troubleshooting procedures you will have your answer. You may not like it, and it is tedious work. But it will save you money in the long run vs throwing parts at it.
If you have followed thru all the troubleshooting procedures you will have your answer. You may not like it, and it is tedious work. But it will save you money in the long run vs throwing parts at it.
