[Hotshot8792]

Originally Posted by s2pidluv4u

...k guys i jus installed my injen intake...i was wondering what does the vacuum hose do...its the little hose u put in front of the throttle body ya the other small hose in the intake i think its called that...anywaz when i was on the freeway and floored it i kinda get this lag so i exit ASAP and went back home...what i found out i kinda cut the vacuum hose 2 short causing it 2 bend so no air will go through the hose...after i replaced it...i went back on the freeway and it runs fine...so i think the vacuume hose resolve my problem?...what does it realli do?...thanks...

well, i will need a little bit more details, but until then, i will make assumptions

I am assuming you have an N/A, and you just bought an intake system that comes with an intake filter and an intake pipe, in which they included vacuum hose with it and you have no idea where the vacuum hose connects. Well, if this is the case the vacuum hose connects on the nipple of the intake pipe (like you said before the throttle body) and it goes to the rear valve cover.

If my assumptions is not right, please give me a little bit more detail such as what model 3/S you drive so i can help you.