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Old 05-21-2009, 02:22 PM   #1
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Default PCM or ECU Problem?

i have a 1994 pontiac boneville se and when we drive it the check oil light and check engine light
comes on and the car shuts off while driving and after sitting for a while starts back up. we were thinking it could be the pcm or the ecu? could anyone help.

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Old 05-21-2009, 02:56 PM   #2
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Which happens first

You notice the lights or you notice the rpm? I'd venture to say it'* stalling which kicks on the lights.

Suggested items would be:
Check for any codes stored in the computer.

Check all battery connections for corrosion and good connectivty.

Crank sensor replacement

PCM replacement.
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Old 05-21-2009, 04:00 PM   #3
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The PCM can it be easily accessed? And Where do you think I could get one from?
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Old 05-22-2009, 09:40 AM   #4
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Sounds like you might be aiming to shotgun a pcm.

Your pcm is located under the dash on the passengerside.
Remove the black plastic hush panel from under the dash. Looking at where the carpet ends there is a flat sliver case with red white and blue connectors. That'* the pcm.

When swapping you need to remove the access panel on the pcm and swap the blue chip into the new computer.

I have found replacements at auto parts stores and junkyards.
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