ICM replaced 3 times and still no spark and no codes

BIGBEN

MEMBER
1992 OLDSMOBILE 88
111,000 MILES

The car died occasionally and I chalked this up age and temp, so as soon as a no spark code popped up, I replaced the ICM and it started up right away, but 2 days later it died and wouldn't start, or pop out codes to wire or diagnostic tool. I've heard so many different things could be wrong, but no one can explain the loss of all access to diagnostic. Please help.

3.8L V6 Oldsmobile Delta 88 Royale 111K

7 Replies

FIXITMR

MECHANIC
9,990 POSTS

Does ecm (puter) have power?

Was this

answer

helpful?

Yes

Thursday, December 15th, 2011 AT 8:17 PM

BIGBEN

MEMBER
5 POSTS

My mechanic has been telling me the wiring harness could be damaged, but to answer your question - I am not sure if the icm has power, I am assuming it does only because the car had started briefly. How can I check?

SPONSORED LINKS

Was this

answer

helpful?

Yes

Thursday, December 15th, 2011 AT 8:23 PM

FIXITMR

MECHANIC
9,990 POSTS

Did you check all your fuses? Did you check car for spark, fuel pump operation?

Was this

answer

helpful?

Yes

Thursday, December 15th, 2011 AT 8:32 PM

BIGBEN

MEMBER
5 POSTS

I have not checked any of that, my buddy did check for spark, but I have not checked fuses. I will. This is what I've been looking for, I can do most things, but I have no idea where to begin. Thanks, I'll give those a look.

Was this

answer

helpful?

Yes

Thursday, December 15th, 2011 AT 8:37 PM

BIGBEN

MEMBER
5 POSTS

Ok, The fuel pump is working (i turned the key to accessory and there was a hum from the pump) and all the fuses checked out. When I drove the car the last time it died a few times during that day and had a delayed start in there as well, but when it was close to dying it was when the rpms were low - like at a stoplight or residential roads.