Possible Cause & Correction

Check the following items:

• Check for binding throttle linkage.
• Check for leaking injectors. On PFI vehicles, perform INJECTOR BALANCE TEST in appropriate I - SYS/COMP TESTS article in this section.
• Check IAC system. See DIAGNOSTIC AIDS in CODE 35 chart in the appropriate TESTS W/CODES article in this section.
• Check engine for overheating.
• Check for excessive use of fuel additives.