intake lines

[dabum]

alrite im making a custom cold air myself for my car, anywayz i made the tube wit tha 3 intake lines at the top near the throttle body nd one all the way at the end for the aiv valve, routed it and all.. after i took out the stock tubbing i noticed another hose under the intake tubbin connected to it which is a pretty big hose.. i started my car nd my car is runnin poorly its not pullin or anything and 80% of the time it keeps jumping..

what i really wanna know is what could be causing this? do i have to make another hole nd route the tube? is there a way to take out this tube ? what the hell does that line do? and could this be caused by my maf shaking if not mounted on well?

thanks for any help in advance

[Scott McLellan]

ya you need to mount it too. sounds like a vaccum tube