C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ECM problem?

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Old Sep 20, 2025 | 09:20 PM
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Conv92's Avatar
Conv92
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Default ECM problem?

My 92 starts then dies immediately.
If I rap on the ECM it will start and run fine.
It will start and run a couple more times then goes back to starting and dying.
I had the ECM repaired. I was told there was loose solder.
Reinstalled the ECM but the problem persists.
Also the ASR warning light is on.
Any suggestions would be appreciated.
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Old Sep 24, 2025 | 01:11 PM
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Originally Posted by Conv92
My 92 starts then dies immediately.
If I rap on the ECM it will start and run fine.
It will start and run a couple more times then goes back to starting and dying.
I had the ECM repaired. I was told there was loose solder.
Reinstalled the ECM but the problem persists.
Also the ASR warning light is on.
Any suggestions would be appreciated.
I would send it back to the place that repaired it. If rapping on it still works, something is loose.
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Old Sep 24, 2025 | 09:40 PM
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I did return it and it checked out ok.
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Old Sep 24, 2025 | 09:45 PM
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arbee
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Originally Posted by Conv92
I did return it and it checked out ok.
Could be a connection problem then. Check all the pins on the harness. Instead of banging on the ECM, try moving the connectors a bit.
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Old Sep 24, 2025 | 10:05 PM
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I sprayed all connections with electrical cleaner and it has been working ok for the past 3 days.
Hoping for the best.
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