- Check the PCV ventilation hoses for clogging and leaks. The hoses may be
cleaned with compressed air.
- Check the oil filler cap to insure that the gasket is not damaged and the
cap fits firmly on the filler cap end.
- Disconnect the hose from the PCV valve.
- Start the engine and place your finger over the top of the PCV valve. Lightly
increase the throttle.
- The valve and system are operating properly when a vacuum is felt. If no
vacuum is felt, replace the PCV valve and check the hoses for obstructions.
- The PCV valve can be checked while off the vehicle by shaking. If a distinct
rattling is noticed, the PCV valve is functioning properly.
