94 z28
#1
94 z28
Okay here's the deal. My z28 died while driving on the freeway would not start again. I had it towed home and started researching. The car would crank but wouldn't start. Has a new opti new plugs new wires . So I pulled a plug and tested for spark which there was not one . I narrowed it down to the icm. Replaced that now car will turn over run for a second and die. Has aaa come out and try to jump me. It did the same thing although the aaa guy tested my battery and said it was dead. I don't know what would be wrong the battery shouldn't stop it from running especially cause I have a new alternator. Any help would be greatly appreciated
#2
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,353
A car needs a lot more juice to crank an engine over then it then it needs to fire a plug. Your battery may have been push over the edge by all the cranking you did to try to figure out what is wrong but I doubt it is the cause of the problem. It can be pretty common to have to replace and battery or a starter right after a fuel pump/ignition failure.
Are you still losing spark before it dies? Now that you have spark have you check fuel pressure?
One mistake amateurs make is they tend to assume that if something is newer it cannot be at fault. When I did warrant work for GM most of the parts I replaced were less then a year old. We even had cars die backing off the transport truck. Most of us techs would keep known good parts to test problems. If you are testing for a bad ICM with a new defective ICM then it can drive you crazy trying to figure things out.
Are you still losing spark before it dies? Now that you have spark have you check fuel pressure?
One mistake amateurs make is they tend to assume that if something is newer it cannot be at fault. When I did warrant work for GM most of the parts I replaced were less then a year old. We even had cars die backing off the transport truck. Most of us techs would keep known good parts to test problems. If you are testing for a bad ICM with a new defective ICM then it can drive you crazy trying to figure things out.
Last edited by Gorn; 11-27-2016 at 01:35 PM.
#3
Okay here's the deal. My z28 died while driving on the freeway would not start again. I had it towed home and started researching. The car would crank but wouldn't start. Has a new opti new plugs new wires . So I pulled a plug and tested for spark which there was not one . I narrowed it down to the icm. Replaced that now car will turn over run for a second and die. Has aaa come out and try to jump me. It did the same thing although the aaa guy tested my battery and said it was dead. I don't know what would be wrong the battery shouldn't stop it from running especially cause I have a new alternator. Any help would be greatly appreciated
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