Lincoln 2L3Z-6A666-AA PCV Valve

To sustain the efficient operation of a PCV system, it must be kept clean and its hoses checked according to the maintenance schedule. First, start the engine then disconnect the PCV valve from the intake manifold and check for vacuum. You will feel a vacuum if it is working properly. If there isn't any vacuum remove the hose to see if there is one inside it. Replace the valve if the hose has suction but not the valve itself. Find out whether a hose is blocked or broken by checking for suction at its ends. Inspect the grommet for damage and replace it as necessary. Clean and inspect the hose ensuring a snug fit. Install a new PVC valve as may be necessary.