THere are two vacuum lines that come off the passenger side of the throttle body, that go into some sort of circular pressure switch, then go into one rubber hose, that used to go to something on my car, but I'm not sure what it is, since i've removed the AC, smog pump, Charcoal Canister, etc... for fitting of my twin turbos. If someone could help me out, tell me what these are, and what i can do to handle them properly by plugging it, or venting the rubber hose, or something.

pj

 

It would help to know what year/engine/fuel system you have, since there were some significant differences.

 

correct we need more info. but on my 1991 the smaller line on the pass side goes to the charcoal canister so that can obviously be cut off (like mine will be) or plugged and the other should have a tube that vents to the pass valve cover. not exactly sure what the purpose it of that one but im sure someone will chime in and let us both know. the smallest vacuum line on the bottom of the tb still intrigues me, and i would defenitly like to know since i need to know if i need it with my hsr.

 

One should go to the charcoal canister, one to the breather tube, and there should be a small one going to the heater valve.