Sounds like maye the PO did the IAC. Try pulling the Factory Service Manual "raider_fsm_1989_powertraindiagnostics-30l" that is on the site in my signature.


Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand!
Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top
Her Truck: 03, 3.8, 20th Anniv, 65k
Daughter's: 06 Eclipse, Keeping it Mitsu!
FSMs: MitsubishiLinks.com