When idling speed increases, the following should be checked.
1. Idle Control System. Auxiliary Air Control Valve, Fast Idle Control Device are components thay should be checked/cleaned.
2. Vacumn leaks at intake system. Check the PCV and other vacumn solenoids that might be sticking.
3. Throttle linkage operations. Cheeck cable adjustment. If there is insufficient free travel, the throttle might not be able to close fully intermittenty.
Friday, April 9th, 2010 AT 2:31 PM