PCM problems
Thread Starter
Joined: Jun 2009
Posts: 901
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From: Cartersville GA
PCM problems I was driving the car the other day in the rain, I stop to get a rain jacket and when I came back to start the car it started and idled at 500 rpms then died
. I got the car back to the shop and replaced the opti with an AC Delco opti, the car ran great for about an hour, and then reverted back to the previous symptoms. We found out that there was no injector pulse on every other injector, could this be a bad PCM?
. I got the car back to the shop and replaced the opti with an AC Delco opti, the car ran great for about an hour, and then reverted back to the previous symptoms. We found out that there was no injector pulse on every other injector, could this be a bad PCM? Thread Starter
Joined: Jun 2009
Posts: 901
Likes: 572
From: Cartersville GA
I have an extra PCM but with no tune it doesn’t do me any good
Thanks tho
The opti harness was checked and is good. We have tried three optis all AC Delco’s and they all are bad within one hour of running the car. I just wanted to confirm that it was the PCM before i called to complain, and it not be the problem.
I have an extra PCM but with no tune it doesn’t do me any good
Thanks tho
I have an extra PCM but with no tune it doesn’t do me any good
Thanks tho
FWIW....I drove through a HUGE puddle (probably a foot deep on the passenger side) during a rainstorm in my 99 Firehawk and apparently got the PCM wet....all sorts of lights were coming on on the dash and it died a couple times on the road....2 days later it dried up and everything was back to normal like it never happened
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Thread Starter
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From: Cartersville GA
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TECH Veteran
Joined: Dec 2008
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From: Little Rock, AR
That's because power does not come from the PCM. It comes from the fuse. Ground comes from the PCM. Have you checked your injector fuses? There are two and each supplies half of the injectors.
Thread Starter
Joined: Jun 2009
Posts: 901
Likes: 572
From: Cartersville GA