Thread: 2000 GTP miss on hard acceleration

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  1. #1 2000 GTP miss on hard acceleration 
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    I have a problem with the car "missing" on hard accel. This happened about a year ago after I had the heads rebuilt (bad valve guides). I was driving it pretty hard, the cat converter failed probably due to the excess oil from the valve guides. I cleaned all the debris from the cat out as well as the rest of the exhaust. I'm wondering if the back pressure from the converter caused a gasket blow out. The car drives fine driving normally but if you get after it anything above 4000 rpm the engine misses, if you back off it drives fine. No engine light or other signs of major problems. The car has TOG headers and borla exhaust. Aftermarket ECM, cam, heads. I haven't taken it in because I haven't driven it due to financial problems. I need to install a half shaft cv axle on the pass. side and change fluids before she's ready to take to the road. Anyone who has any thoughts please post. I'd rather not take it to a shop right now as money is tight.
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  2. #2 Re: 2000 GTP miss on hard acceleration 
    TDCRacing
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    Be sure your posting in hte correct section. That way you get the best results.

    Welcome to the community.
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  3. #3 Re: 2000 GTP miss on hard acceleration 
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    Missing under heavy load can also be a weak or failing coil pack.
    '98 Bright Red GT 278,000 miles and counting...
    '02 Galaxy Silver GTP GMPP Suspension, F Body front brakes, TDC FWI intake, Ported M90, Intake, and Throttlebody, Overkill PCM
    '02 Bright Red GT
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  4. #4 Re: 2000 GTP miss on hard acceleration 
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    I'll move this to a tech forum, thanks mystic231 and TDCRacing....
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