Question about 1999 Pontiac Grand Prix

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1995 pontiac grand prix with a 3100 sfi v6. the car runs but not well. the car does alot of bucking the rpm drop when car is in gear and gets stuck almost at like 1200 rpm untill you let off or give it alot of gas. the whole car will shake. thought that it might be a misfire in the engine but im not sure what it could be.

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  • ph_harris1 Oct 31, 2008

    I have a 1997 Pontiac Grand Prix gtp it runs fine some times but some times when i get on it no matter at what speed its starts jolting pretty bad like its chocking out and i have no idea what the promblem is

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2 Answers

Puchase a jet performace stage II PCM chip.. i had the same problem.. installed the chip on my 95 grand prix se.. works perfect

Posted on Nov 05, 2008

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First thing is to check to see if the "check engine light is on...if so, check for trouble codes, then address any codes that show up...if the "check engine light isn't on, then you should do a pressure test on your cooling system, to see if maybe you have a head gasket leaking, (most rad shops will do this for little or nothing $$$) If you haven't changed your fuel filter in a while you should do that anyway. If everything checks out so far than you should check your fuel pressure, with a pressure guage. You may also want to do a compression test if the above seems o.k.

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Posted on Sep 18, 2008

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