Possibility of Clogged PVC

2008 MAZDA TRIBUTE
72,000 MILES • 2.3L • 4 CYL • FWD • AUTOMATIC
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NONDRIVER65
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when the engine is running and I take off oil fill cap there is a lot of air flow with sound coming out of fill hole, like it an exhaust port. does this mean my PVC valve is clog? also, engine idles differently when cap is off.
Sep 24, 2016 at 11:21 AM
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CJ MEDEVAC
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The PCV system could possibly have carbon build-ups in it.

However, the PCV can only "vacuum" so much, even in pristine condition.

Ring wear (even a broken ring), cylinder wear, might cause excessive blow by, a compression test might be a way to verify it.

The Medic
Sep 25, 2016 at 2:10 PM
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