Idle Speed: Adjustments

CARBURETED MODELS
Check and, if necessary, adjust ignition timing before adjusting fast idle speed.

Make all adjustments with engine at normal operating temperature, choke fully open, air cleaner installed and A/C control Off, if equipped.
1. Disconnect and plug vacuum hoses as directed on vehicle emissions label.
2. Position fast idle speed screw on specified step of fast idle cam as directed on emissions label, then start engine.
3. Turn fast idle screw inward or outward and adjust fast idle speed to specifications.

FUEL INJECTED MODELS
Fast idle speed is controlled by the ECU or ECM and is not adjustable.