Remove the PCV valve from the valve cover grommet.
Disconnect the hose from the PCV valve and remove it from the vehicle.
Fig. 1: To remove the PCV valve, first detach the
vacuum hose from the valve . . .
Fig. 2: . . . then pull the PCV valve from the valve
cover grommet
Check the PCV valve for deposits and clogging. If the valve rattles when
shaken, it is okay. If the valve does not rattle, clean the valve with solvent
until the plunger is free, or replace it.
Check the PCV hose and the valve cover grommet for clogging and signs of
wear or deterioration. Replace, as necessary.