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HOMESERVICE MANUALSFORD2005TAURUS SEL, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1484 (ENGINE CONTROLS - PINPOINT TESTS (HYBRID))PINPOINT TEST HG: POSITIVE CRANKCASE VENTILATION (PCV) SYSTEMTEST PROCEDURE
2005 Ford Taurus SEL, 4D Sedan

Test Procedure

2005 Ford Taurus SEL, 4D SedanSECTION Test Procedure
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. 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 No
    REPAIR as necessary. GO to  HG2.
  2. 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 No
    GO to  HG3. INSTALL a new PCV valve.
  3. 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 No
    The PCV system is OK.
    RETURN to SYMPTOM CHARTS for further direction.    		 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.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.