Possible causes for the problem are :
1. Idling speed too low. Get the IAC and throttle body cleand and idle speed adjusted and retest.
2. Excessive freon in system. If greon had been topped up, you could have ovecharged the system.
3. Erratic idling speed. Could be due to out of specs vlave clearances. Check/adjust valve clearances.
Monday, June 28th, 2010 AT 2:46 PM