Hi New to the Fourms!

I have a 1994 Grand Cherokee 2wd ( I know changing it to 4wd drive soon).

The Engine is a 4.0L and under a load, AC on or when in drive or park the engine seems to bog/Vibrate. You can feel it through out the Jeep. Any Ideas what it could be?

I have tuned it up. Cleaned the throttle body.

Thanks fo any help i can get.

How many RPM's is the car sitting at on idle ? Could be missfires or inproper gap on the sparkplugs.

does your idle needle go up and down when your at idle in park

The IAC motor may not be functioning and causing the idle to be too low under load