Question about 1999 Pontiac Grand Prix

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My car does not accelerate like it should. If I step on the gas, it makes a "chug chug chug, etc" sound, until I hit close to 10mph, and then is fine. When I get around 50mph, it does it again, and won't stop from then on.

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  • Anonymous Mar 14, 2014

    Car chugs when I step on the gas 92 mercury marquise

  • Anonymous Mar 14, 2014

    Car chugs when I step on the gas 92 mercury marquise

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  • 9 Answers

Could be any number of things. Have you or anyone else done any maintenance lately on it?
If so, What was done?

Posted on May 29, 2011

  • justin black May 30, 2011

    Well, it's always done it, even after i changed the fuel filter and fuel pump. I asked around and people keep telling me spark plugs, but i know they're firing and all because i had a tech check them out. and he couldn't figure out the problem either.

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