you can remove the hose and put a screw in it.. .but my cars sensor doesnt have a vacum line hooked up to it.. i wondered what that was.. so do i need to put a screw in it??? just leave it alone??? where does thevacuum line go???

 

Are you saying that you only have one hg line going into it? So, are you missing a hose? Did you upgrade to an MBC, EBC, or are you just running off the gate?
If you have a line going into the BCS and that line is connected somewhere, you're going to have to either remove it completely and cap it's source or replace all lines back to stock. You can't just put a screw in one nipple with it still connected to hg bro.

 

Ya it sounds to me like someone already deleted it. You have to leave it plugged in but take all of the vaccum lines out.

If it isn't plugged in you will get a CEL.

 

Removed before you got the car... prolly running it straitgate.