W 250 Pickup V8-360 5.9L VIN 5 (1989)
Idle Speed: Adjustments
Coolant Temperature Sensor
IDLE SPEED CONTROL ACTUATOR ADJUSTMENT
1.
Place transmission in NEUTRAL position.
2.
Apply parking brake and/or block rear wheels.
3.
START vehicle and allow to run for at least two minutes.
4.
Turn engine OFF, and allow 60 seconds to elapse for the throttle kicker to fully engage.
5.
Disconnect the electrical connector to the idle speed control actuator.
6.
Disconnect the electrical connector to the coolant temperature sensor.
7.
Connect a tachometer to the engine.
8.
START the engine and allow to warm up to normal operating temperature.
Idle Speed Control (ISC) Actuator Adjustment
9.
Adjust the extension screw on the idle speed control actuator until the RPM is approximately 2650 to 2750 RPM (vehicle with less than 1000
miles) or 2750 to 2850 RPM (vehicle with more than 1000 miles).
10.
Turn the engine OFF.
11.
Reconnect the electrical connector to the idle speed control actuator.
12.
Reconnect the electrical connector to the coolant temperature sensor, and erase any fault codes that may have been set. For clearing fault codes
refer to COMPUTERIZED ENGINE CONTROLS.
