Hello.
I'm no spring chicken to life, but surely young to fixing my own car.
My Bonneville runs very quiet.
But seems to have a major issue I can't seem to find an answer to, in that its on its 3rd computer.
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Which one. PCM?

Ummm not sure. I'm a spring chick here. It'* my main computer runs my whole car.

Not sure what PCM means ..
This is my main computer under my dash.

I think you are over your head.

I have someone helping me. But I somewhat agree. However never to old to learn.
I may not have all the words correct, but I am figuring this out.
Yes it'* the PCM.

Does your helper have a scan tool and a meter to read voltage and resistance?

Moved thread from "Introductions for new members" to "Pontiac".

What are the symptoms when this computer fails?

P owertrain
C ontrol
M odule

It is the computer that controls the engine.