Unless its leaking through to the vacuum package, when then it can. But honestly had poor sealing with the PV gasket speraerating in the middle far more than I've had PVs with a diagphram that was torn.
I've never seen one torn, but I have removed one to prove the point that they have zero effect at idle. I did it for a hard headed Chevy guy that just didn't know when to shut up.
