While I'm waiting on my S/C being rebuilt from PWC muscle I noticed on my throttle body there is a brass nipple with no cap on it. I don't know if I knocked it off or not. Does anyone know what its for or if it needs a cap. I would think it would suck in engine compartment air or blow out air from the supercharger ?
I felt and its ahead of the butterfly... So how long is the hose and does it just vent into the engine compartment or is it plugged. Thank you for looking