Crankcase Ventilation System Inspection/Diagnosis

Crankcase Ventilation System Inspection/Diagnosis

Notice: Refer to Fuel Vapors in Evaporative Emission (EVAP) Components Caution in Service Precautions.





1. Blow air into the cylinder head side of the PCV valve.
2. Check that air passes through the PCV valve easily.





3. Blow air into the intake manifold side of the PCV valve.
4. Check that air passes through the PCV valve with high resistances.
5. If the PCV valve fails either test, replace the PCV valve.