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Home >> Isuzu >> 1996 >> Oasis LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Idle Control System >> Fast Idle THERMO Valve
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Fast Idle THERMO Valve

  1. Remove intake air duct from throttle body. Start engine. Remove fast idle valve cover. Fast idle valve is located near throttle body. Place finger on valve seat area. Check for airflow with engine cold and idling. If airflow does not exist, replace fast idle valve.
  2. Warm engine to full operating temperature (cooling fan comes on). Verify valve is completely closed. Valve is leaking if engine speed decreases when lower port is covered and suction can be felt in valve seat area. Replace valve if valve operation is not as specified.
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