D 250 Pickup V6-239 3.9L (1989)
Idle Speed: Adjustments
1988-90 V6 & V8: Run engine for two minutes and shut off. After 60 seconds, disconnect ISC and Coolant temp. sensor connectors. Adjust extension
screw on ISC to adjust.
Idle Speed: Adjustments
1988-90 V6 & V8: Run engine for two minutes and shut off. After 60 seconds, disconnect ISC and Coolant temp. sensor connectors. Adjust extension
screw on ISC to adjust.