Idle should be between 500 to 750 RPM.
Hey Bill==It is probably the idle speed solonoid. Have it checked out. GoodluckJOe
The computer will set the idle between 600 and 1200 rpm.
Idle is computer controlled and is not adjustable.
The idle speed is computer controlled. If the idle is too low, there is a problem with a ssensor or the idle speed motor.
Should be at least 10 at idle. 25 at idle would be better.
Is it a 4 cylinder? Sometimes a 4 cylinder engine will shake a little extra when the AC is running and it's at an idle. You might be able to step up the idle a little extra but 4 cylinder engines are notorious for shaking when the AC is running.
You can not adjust the idle screw, it is sealed off at the factory. If you are having a high idle problem check for a vacuum leak or a bad idle air control valve. These will commonly cause a high idle.
Normal is 30 at idle. 50+ at 3000 rpm. Minimum is 12 at idle.
Could be a vacuum leak
Cylinder misfire. Possibly failed or failing engine mounts.