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I'm pretty sure it's closed at idle, otherwise it would act like a big vacuum leak.

That is real easy to check, start your motor up, pull the PCV out and put your finger over the hole in the bottom of the PCV and let us know if your motor speeds up or slows down blocking the PCV Let us know your results

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)