LT1 Vacuum line in fuel line to where?
11-18-2012, 12:44 PM
#1
Staging Lane
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LT1 Vacuum line in fuel line to where? I'm finishing putting my intake back on and there's what looks like a vaccum line that comes out the the plastic tubing for the fuel lines. Where does this go to? Look at the pic below. Thank you in advance!
11-18-2012, 01:51 PM
#2
Village Troll 
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That is your fuel vent tube. Shitty design, but there's a plastic tube that is supposed to go in front of your manifold, under the throttle body. It is supposed to connect to that which ultimately connects it to the EVAP solenoid on the passenger side.
05-04-2013, 04:55 PM
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I wouldn't suggest capping it, I don't recall the EVAP system on the lt1 having a vent solenoid on the charcoal canister and i couldn't find evidence of one after a quick search. If that is the case, then capping the line would cause vacuum to build up in the fuel tank as the fuel level falls. Best just to leave it open or put a breather of sorts on it
05-19-2013, 06:44 PM
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That line goes to the purge solinoid on the pass side intake. The solinoid opens and ports the fumes from the charcoal canister to the throttle body. Use It. It wont hurt anything and keeps from contaminating the charcoal canister.
