Diagnostic Aids
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
Inspect for the following conditions:
- Check for restricted air intake system.
- Check for collapsed, clogged, or loose air intake ducts, clogged air filter, and proper operation of mass airflow sensor.
- Check for a tampered or damaged throttle stop screw.
- Check for a tampered or damaged throttle plate, throttle shaft, or throttle linkage.
- Check for objects blocking IAC passage or throttle bore.
- Check for excessive deposits in IAC passage or on IAC pintle. Check for excessive deposits in throttle bore or on throttle plate.
- Check for vacuum leaks.
- A low or unstable idle condition could be caused by a non-IAC system problem that cannot be overcome by IAC valve. See SYMPTOMS in appropriate TROUBLE SHOOTING - NO CODES article.