Problem Description and Possible Solution
If you experience difficulty starting the engine when cold, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steady when the accelerator pedal is not pressed.
Problem DataRepairPal Verified
Average mileage: 105,410 (68,230–125,000)
1 model year affected: 1990
4 people reported this problem
Same problem here. Trouble starting, stalling out when idle directly after starting, and hesitation when accelerating. Replacing the idle air bypass valve fixed it all.
When engine is cold, starts fine but when partially through warm-up cycle engine at idle lugs and stalls. no apparent reason for failure. RPM while shifting is erratic as well as base idle level is low.