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Positive Crankcase Ventilation

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Infiniti QX4, 2003 Infiniti Q45, 2003 Infiniti M45, 2003 Infiniti I35, and 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

Run engine at idle. Remove ventilation hose from PCV valve. Hissing noise should be heard and a strong vacuum should be felt immediately when finger is placed over valve inlet. If vacuum is not felt, check PCV valve for clogging. Service or replace as necessary.

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