When you jump the connectors the IAC goes to the fully closed position, It also removes all computer advance so you can set mechanical timing, so I would take the IAC off and clean it and the TB port. That should help fix the idle.
Also look for any vacuum lines that are suspect, cracked/torn.
NOTE: Do not remove the IAC with ign. On or diagnostic terminals jumped.
Tuesday, November 4th, 2008 AT 7:33 AM