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What causes the throttle to rev up and down while driving on a 2000 pontiac grand prix?
Wiki User
∙ 12y ago
My 2000 Pontaic Grand Prix GT has been doing the same thing and the dealer where I got it said that I needed to replace the Mass Air Flow Sensor, the also said cleaning it would help but I tried that and it didn't work. I checked on the price of that part and it was 139.00 plus an 87.00 core charge fee that would be refunded after the old part was returned to the store. Maybe that will help you in fixing your car.
hey i also have the same problem. my research tells me that i could be dirty injectors, bad o-rings on injectors, bad compression on one or more cylenders, or a faulty air idle motor. the motor is a valve that controls the engins used air that goes back in the intake manifold. and its on the right side of the motor. its not covered by anything and is near the fuel rails. its probally easy to replace. that's all i know, hope i helped
Wiki User
∙ 12y ago
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