Idle Speed
NOTE:
Idle speed is controlled by ECM or PCM and is not adjustable. Slight fluctuations in idle speed are considered normal. Start and run engine for at least 7 minutes to establish ECM or PCM control of idle.
NOTE:
Incorrect idle speeds are normally caused by dirty throttle plate or vacuum leaks. Ensure all vacuum components are functioning properly.
- Idle speed is ECM/PCM-controlled. Resetting of IAC valve pintle is the only adjustment that can be performed. To reset IAC valve pintle position, turn ignition off.
- Disconnect negative battery terminal for 10 seconds to clear ECM/PCM memory. Reconnect negative battery terminal. Turn ignition on for 2 seconds, then off for 10 seconds. Start engine, and check for proper idle operation. Repeat step 1) if proper idle operation is not obtained.