So after some research after yesterday's fiasco, I did some research because I had No idea what the lower Nipple was for on this BOV. The previous owner had it capped off like a moron.
I know it can be left open or run to a dedicated boost source, my question is what should the nipple be doing. When I uncapped it it was sucking MAJOR vacuum at idle. Should it be sucking air all the time like that?