HG - Test

HG: Positive Crankcase Ventilation (PCV) System

HG: Introduction HG - Introduction



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HG1 VISUAL INSPECTION OF THE PCV VALVE

- Check the PCV valve, hoses and connections for leaks or restrictions.
- Verify the proper PCV valve part number.
- Verify the PCV valve is clean.
- Verify the fresh air tube and related hoses are clean and routed correctly.

Are there any concerns found during the visual inspection?

YES
REPAIR as necessary.

NO
GO to HG2.


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HG2 STUCK PCV VALVE CHECK

- Disconnect the PCV valve from the valve cover.
- Shake the PCV valve.

Does the PCV valve rattle when shaken?

YES
GO to HG3.

NO
INSTALL a new PCV valve.


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HG3 PCV SYSTEM CHECK

- Install the PCV valve.
- Start and warm up the engine until the engine temperature is stable.
- Disconnect the closure (fresh air) hose from the remote air cleaner or air outlet tube (the tube connecting the mass air flow sensor and the throttle body).
- Place a stiff piece of paper over the hose end. Wait 1 minute.

Does vacuum hold the paper in place?

YES
The PCV system is OK.

RETURN to Symptom Charts Symptom Related Diagnostic Procedures for further direction.

NO
CHECK for vacuum leaks/obstruction in the PCV system (such as oil cap, PCV valve, hoses, cut grommets, valve cover bolt torque/gasket leak).

REPAIR as necessary.