PCV Valve Inspection
WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Removing the PCV valve might damage to the tab of the PCV valve and it will not be able to be reinstalled. Due to this, inspect the PCV valve with it installed on the vehicle.
- Disconnect the negative battery cable.
- Disconnect the PCV hose from the PCV valve.
- Apply pressure to the PCV valve and verify that there is no airflow.
- If there is airflow, replace the PCV valve.
- Apply vacuum tot he PCV valve and verify that there is airflow.
- If there is o airflow, replace the PCV valve.