it may be the iac (idle air control) located on the throttle body. remove the whole throttle body and remove the iac and give it a good thorough cleaning with carb cleaner. especially the iac use a toothbrush if needed. that should help, if not back to the ol drawing board.

out of all the jeeps in this town the d**n gremlin had to invade mine

I've done so much,with so little for so long i can practicly do anything with nothing