E46 Intake Manifold Noise?

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End up being the CCV, change it to a PCV and the engine runs 100%. Noise is also gone.

DirtyMikeSlays
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I think idle control valve chocked, they sounds exact same

NirmalSingh-gfef
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Fuel is not burning correctly thats why it sounds like gun shot inside of manifold

aydinkov
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I heard that in mine today after i changed vacuum lines…..what is that?

josepha-rt