Envoy 2WD V6-4.3L VIN W (1998)
Idle Speed: Adjustments
Base Idle Speed
The minimum idle speed air rate is set at the factory with a stop screw and is not adjustable. This setting allows enough air flow by the throttle valves to
cause the Idle Air Control (IAC) valve pintle to be positioned a calibrated number of steps (counts), from the seat, during controlled idle operation. If
Idle Speed is incorrect, begin diagnosis at System Diagnosis / Flow of Diagnosis.
