2000 Pontiac Grand Am engine

Hi nineball,

Thank you for the donation.

What is the idling speed after warming up?
Do you have symptoms of hesitation, misfiring or lack of power?
Any difference when in Park or Neutral and othere gears?

idles at 750 rpm after warm up,no lack of power but a slight hesitation as it is refed. cant hear a miss when driving. it has plenty of power at normal dring speed.just shakes at idle after its warm. no change in different gears.noticed it would shake more when i loaded the battery more like when i would use the power windows. so i pulled off the drive belt to see if it was the alternator bogging down the engine. small improvement but still shakes.

Hi nineball,

From your description, seems the engine mounts are not in good condition.

Try usiing a floor jack with a small plank on top and using it to support the engine oil sump lightly and if the vibration disappears, the engine mount needs to be loooked into.