LT1-LT4 Modifications 1993-97 Gen II Small Block V8

runs then dies

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Old Mar 24, 2013 | 04:45 PM
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Default runs then dies

Hey my 97 camaro will start run drive then all the sudden cut out and die it loses spark have a MSD box on it and when it's plugged in it won't run is long before it dies with the MSD box plugged in it will run for maybe 2 minutes with it unplug it will run for maybe 15 minutes I just replace the of the but I'm not saying that that can't be the problem any ideas on what's going on with my car?
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Old Mar 24, 2013 | 10:34 PM
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Any ideas? Icm? Opti?
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Old Mar 24, 2013 | 10:45 PM
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Does it run good for the 15 mins?

Trying to diagnose problems with a ignition box is hard, leave it out.
If it runs good, suspect heat soak for the ICM.

Opti usually has some signs of miss after so many rpms, a stumble ect.
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Old Mar 24, 2013 | 11:43 PM
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Yeah it runs fine then its like someone shuts off the ignition. It doesnt seem to miss. I have the msd box removed right now and it runs good for about 15 min then it just shuts off. If I plug the msd box in it will only run for a few min then die. Maybe something to do with the higher voltage?
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Old Mar 25, 2013 | 09:31 AM
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Check the Ignition switch on the lower part of the column, I had a similar issue
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Old Mar 25, 2013 | 03:07 PM
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I would start by telling us what coil you're running? If it's the MSD coil the ICM is overloaded without the MSD box.

Al 95 Z28
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Old Mar 25, 2013 | 05:54 PM
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Yeah I have a msd coil. I been running it for a long time. Do you think it may be too much for it? I will replace the icm and see if that fixes it.
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Old Mar 25, 2013 | 09:14 PM
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I'm not a fan of the MSD stuff.

Owner before me put in a MSD Opti, two days after I had the car it died.
I have tried coil from there and ended up going back to a AC Delco coil.
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