Bad PCV? Idle issue

I just had a thought. With the loose base plate the PV could lose some vacuum signal, which would allow the spring to open the fuel-port, which would set the boosters to dribbling. does that sound about right? Cause if it is right, I want to try and remember that for future reference.
Cause kinda like TB says I dont think A loose base plate even entered my thoughts.I have only ever seen a loose plate once.Good catch, cause on some combos that center screw under a Holley, can drop right into the manifold.OUCH!