95 Computer Prob., Will this work without new computer - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-25-2007, 12:19 AM   #1
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Default 95 Computer Prob., Will this work without new computer

This 1995 sse I bought is having the PCM charging problem and had it in the past before I bought it. If I were to leave the pcm alone and do some upgrades for my system would they even work with the messed up PCM, or maybe make do.

I was thinking about replaceing all the engine and alt. grounds with 4 ga wire (known as the big 3), and putting in a High output(140-160amp) alternator, and also a 3-5 fared Capacitor for my subwoofer amp.

Will the faulty pcm limit the High output alternator also and how bad?
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Old 10-25-2007, 08:25 AM   #2
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Originally Posted by BillBoost37
Nothing really with a charging system problem that I'm aware of...more of a when the car runs oddly or badly and you can't figure it out.. swap out the pcm. Usually that fixes things up. Many here with your year have a spare pcm they picked up at a great deal from a JY etc for that just in case situation.
Replacing the pcm is quick and easy. I'd still like to know what you are talking about saying it'* a charging system issue that is pcm related. Your alternator and battery can be tested independently to rule them out.

Upgrading the wiring like you are aiming for a large stereo is not necessarily the answer if the car is stock.
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Old 10-25-2007, 02:58 PM   #3
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Default the old owner

I read on this forum some people having the same problems I am. then also on this forum I have read that the 94-95 model was the only years they ran the charging system through the pcm. The previous owner also mentioned he put a new alternator in only to find out it was the pcm and wasted his money on the alt. My car also has a new battery and the ex-owner put a used pcm in also.
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