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Re: im stumped
I had the same on a 3.3 Grand-am. The shame was the car was perfect with the exception of Cyl. No.1, From what you have said it sounds like a worn or craked piston rings. The rough idle will get worse and the power will drop like a rock from 0 to 30 km after that it will seem to run ok, but in fact it is not. I talked to a engine builder and what they do as quick fix is pull the head off and drop the oil pan, push the piston and rod from the bottom, replace the piston rings with new and re-assemble and there you go, a cheap and fast fix. That is the way 90% of the engine rebuilders rebuild engines. So when some gives a quote to re-build your engine for around $1800 that is what you will get. Time to scrap or do a quick rebuild as above. later
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