Questions & Answers for: Pontiac Grand Prix shaking engine at 40 mph

HELP My grand prix does not exceed 40 mph and when i give it some gas it bgogs down Possible clogged catalytic converter. Is the check engine light on? There was a recall on catalytic converter.

...40 mph now it drove fine till i had it out one day and it lost power and started knocking it still runs though The rod knocking is caused by loss of oil pressure. Did the oil light not come on? That ...

...40-50 mph but when you release the gas pedal, it runs smooth, only when you hold the gas pedal down it shakes bad at around this mph. its not the tires. They are all new and balanced. possibly a ...

...shaking. Sometimes, it surges and chugs. Do not have power to overtake anyone and service engine light comes on. Help.. Sounds like you may have a plugged catalytic converter. The easiest thing you ...

...40 mph and up. I had it checked out am was told that the engine mounts and transmission mounts need replaced. Can anyone provide the steps for doing this? Also, is it best to do the engine mounts and ...

i have a 2001 pontiac grand prix it shakes when i reach 40 to 55mph and only when press on the gas pedal. i have gotten 4 new tires, and alinement on it and change the arm bars and still shakes. cv ...

40-70 mph in a 2004 Granp Prix GT with 3.8L engine and 187,000 miles. Feels like a loss of ignition for about 1-2 seconds. Condition is worse with acceleration or when going uphil with greater hrottle

...40 mph too and it seems to be when I accellerate. Also, turns off the Cruise Control if its on when it jerks. It jerks, the rpm's don't jump. It just jerks out of nowhere for a second then it's fine. ...

2002 Grand Prix shakes when accelerating over 30 mph -Possible tires are out of balance. Good luck Mai

going from second gear to third gear Once I reach 55-60 mph it seems as if the car can't go any faster. It starts to shake a little bit and If I floor the pedal it still doesn't make much of a ...