Can't help you with specifics. But, have you pulled the manual from my site named "raider_fsm_1989_powertraindiagnostics-30l?" There were some changes from 1989 3.0 to 1991, but I doubt there'd be much different in terms of where you troubles lie.


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