Symptom Definition
Engine starts but will not run at idle. Engine runs if accelerator is held at part throttle.
Possible Causes & Corrections:
- Problem is most likely in Idle Air Control (IAC) system. See DIAGNOSTIC AIDS in DTC 35 chart in appropriate TESTS W/CODES article below.
- TESTS W/CODES - 2.2L
- TESTS W/CODES - 3.1L
- TESTS W/CODES - 3.8L
- TESTS W/CODES - 4.3L
- TESTS W/CODES - 5.0L
- TESTS W/CODES - 5.7L
- Check EGR system.
- Check park/neutral switch.
- Disconnect MAP sensor. If condition is corrected, replace sensor.