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Originally Posted by bluebee
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I'm really not sure what that means because I get ZERO RESISTANCE no matter what the engine speed when I blow into the upper CCV vent pipe.
If that means the diaphragm is holed, I 'still' (unfortunately) don't get how that's supposed to indicate that. I wonder if someone with a known good CCV can test and report what happens when they blow into the upper vent pipe?