Positive Crankcase Ventilation: Inspection/Diagnosis
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Do not breathe the air through the EVAP component tubes or hoses. The fuel vapors inside the EVAP components may cause personal injury.
- Blow air into the cylinder head side of the PCV valve.
- Check that air passes through the PCV valve easily.
- Blow air into the intake manifold side of the PCV valve.
- Check that air passes through the PCV valve with high resistances.
- If the PCV valve fails either test, replace the PCV valve.