Idle Speed

NOTE: Idle speed is controlled by PCM and is not adjustable. If engine idle concerns are present, check for contaminated fuel, vacuum leaks and incorrect ignition timing. Ensure throttle bore, EGR system and PCV system are clean. If these are okay, check PCM for DTCs. See SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. If no DTCs exist, see TROUBLE SHOOTING - NO CODES - CNG, FLEX-FUEL & GASOLINE article.