RPM Too High When Warm

SYMPTOM: RPM Too High When Warm

CHECK
1. Electronic Control Module (**)
2. Idle Air Control (IAC) Valve (14)
3. Fast Idle Thermo Valve
4. Hoses and Connections
5. Idle Adjusting screw

Numbers in parentheses are the blink codes displayed at the MALFUNCTION INDICATOR LAMP. (**) MALFUNCTION INDICATOR LAMP stays on without blinking. Notes on Reading Diagnostic List For ECM trouble code component testing procedures see COMPUTERS AND CONTROL SYSTEMS.