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PCV Valve Inspection [L3]: Notes

WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable.
  2. Remove the intake manifold. (see INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3] ).
  3. Remove the PCV valve.
  4. Blow through the valve and verify that air flows as specified.
    • If not as specified, replace the PCV valve.
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