Question about 2001 Pontiac Grand Prix

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Grand prix cuttin out

Thanks for responding. This is a new fuel pump installed by me. The problem didnt occur untill now about two months later. Think it is still the computer? My mullers a very hot after only a minute of running the car. Spit on them and they sizzle. Any suggestions on what to do would be welcome . Thank Robert

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Hotter than uasual mufflers tell me you could have a couple different things going on, running super rich or monster knock that will force the spark timing to be delayed (retarded) way late into the power stroke. I'll need more info.
Start with the basics. You have a 2001 GP, is it an SE, GT or GTP? Are you in Park or Drive when this happens? You say it starts and idles fine, does this problem show up before or after the engine warms up-or does that make a difference? Do the mufflers super-heat before you try the 4 grand run or after? Try this at night, pop the hood and look at the exhaust manifold, is it glowing? Now drop to the ground, right behind the front wheels in the center between them, is your catalytic converter glowing? What octane gas are you using? Did you upgrade your FP to something like a walbro or is it stock? Have you replaced your fuel filter? Any performance upgrades?

Posted on Aug 06, 2008


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