Positive Crankcase Ventilation: Testing and Inspection

View: Positive Crankcase Ventilation Valve:

- Remove the Positive Crankcase Ventilation (PCV) valve from the valve cover.
- Shake the PCV valve.
- Verify that the PCV valve rattles when shaken.
- If the PCV valve does not rattle (sticking), then replace it.
- Reinstall the PCV valve and hoses.
- Warm the engine at idle.
- Disconnect the hose from the PCV valve leading to the throttle body.
- Block the hose opening.
- Verify that vacuum is felt.
- If no vacuum is felt, check for restrictions and replace the hose if restricted or leaking.
- Inspect the evaporative emission hose between the PCV valve and the Charcoal Canister, and replace it if it is leaking.