Plenum
Champion
Joined: Sep 2012
Posts: 4,868
Likes: 434
From: Central VA
Check out the all encompassing plenum thread here - https://dodgeforum.com/forum/2nd-gen...um-thread.html
Administrator
Joined: Apr 2010
Posts: 87,400
Likes: 4,214
From: Clayton MI
Yes, pulling the hose off the PCV valve allows the engine to suck in air, that it wouldn't get with the valve in place. It's a metered valve, it restricts airflow to a specific value. An open port will not. 
