F 350 4WD Pickup V8-6.9L DSL (1983)
Idle Speed: Adjustments
Fast Idle Speed
1. Place transmission in NEUTRAL or PARK.
2. Start engine and allow to reach operating temperature.
3. Disconnect fast idle solenoid electrical connector.
4. Apply battery voltage to solenoid to activate it, then accelerate engine momentarily to set solenoid plunger.
5. Check fast idle speed setting. Fast idle speed should be 875 +/- 25 rpm
Idle Speed Adjusting Screw
6. Adjust fast idle speed, if necessary, by turning solenoid plunger in or out using a 5/16 in wrench.
7. Accelerate engine momentarily, then recheck fast idle speed setting.
8. Remove battery voltage from solenoid and connect electrical connector.