i have a prob with my 3.8 1994 at idle it is running very rough it even stalls out, but if i give it any gas it runs fine like there is nothing wrong,it runs great at any rpm but idle,can some onre please help...thanx

 

While I'm not real familiar with the 3.8 you have, some common items seen with the 4.2 over the years that might be the culprit:

Idle Air Control
Mass Air Flow Sensor
Vacuum leak

Possible plug wires and/or spark plugs.

There are others, but these are where I'd start.