Idle Up Control Valve: Adjustments

Fig. 1 Curb & throttle opener adjusting screw location:

The throttle opener (idle-up actuator) is used to compensate for electrical loads placed on the engine during idle periods.
1. Check and, if necessary, adjust curb idle speed to specification.
2. Use auxiliary lead wire to activate throttle opener control solenoid, then apply manifold vacuum to throttle opener.
3. Accelerate engine to approximately 2000 RPM, then slowly close throttle.
4. Adjust engine speed to 850 RPM using throttle opener adjusting screw, Fig. 1.
5. Repeat step 3 and readjust adjusting screw as necessary.
6. Remove auxiliary lead wire, then reconnect throttle opener solenoid wiring.