ok i plan on venting the pcv for my turbo'd setup and i have a quick question before i do it.

on the vacuum line from the black box to the IM, if i disconnect it from the IM will i have to block off the port so my idle won't go all crazy on me? or is there some sort of check valve there already? question seems kinda dumb, but i just wanna make sure before i go and do it.

 

you will have to plug off the port on the intake manifold, as that is a big open vacuum port