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2G stock boost control solenoid vac lines?

Posted by Rustic gst, Jun 16, 2017

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  1. Rustic gst

    Rustic gst Proven Member

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    Joined Sep 14, 2016
    las vegas, New Mexico
    hey guys i was looking around my car and i noticed the top vac line on the boost control solinoid was just hanging there, and the nipple on my intake had a vacuum cap on it. should i re connect them or leave the cap on the intake nipple?
     

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  2. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member

    2,241
    572
    Joined Nov 14, 2013
    Independence, Kansas
    Lol. Where does the line on the wastegate go? Follow it back to its boost source. If it goes to someplace other than the BCS let us know where it leads to or take a picture and post it up.
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    14b   automatic
    1990 Eagle Talon TSi AWD

    13.620 @ 108.460 MPH
    1990 Eagle Talon TSi AWD

    13.612 @ 107.760 MPH
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  3. Rustic gst

    Rustic gst Proven Member

    53
    0
    Joined Sep 14, 2016
    las vegas, New Mexico
    no the line on the wastegate to the solenoid is connected. im talking about the second line that goes from the solenoid up to the intake right after the maf.
     
  4. Rustic gst

    Rustic gst Proven Member

    53
    0
    Joined Sep 14, 2016
    las vegas, New Mexico
    2g_turbo_vacuum_diagram-jpg.254370.jpg the line going from the solinoid to the intake mine was just hanging and the nipple on the intake had a vacuum cap
     
  5. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member

    2,241
    572
    Joined Nov 14, 2013
    Independence, Kansas
    If the BCS is still working then its "bleeding" boost source pressure on the wastegate. Someone was trying to get more boost out of it. Either hook it up and make sure the solenoid works or eleminate it and go straight from the compressor to the wastegate. Uping the boost then only requires a simple MBC. :)
    I use a very simple bleeder valve, in my cabin, to adjust boost but most of the time they are mounted under the hood in between the WG and the boost source.
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    14b   automatic
    1990 Eagle Talon TSi AWD

    13.620 @ 108.460 MPH
    1990 Eagle Talon TSi AWD

    13.612 @ 107.760 MPH
    Loading...
  6. Rustic gst

    Rustic gst Proven Member

    53
    0
    Joined Sep 14, 2016
    las vegas, New Mexico
    would this hose cause a vacuum leak? i have a real high idle around 2000 rpms, i get off work in 10 minutes so ill plug it back in then
     
  7. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member

    2,241
    572
    Joined Nov 14, 2013
    Independence, Kansas
    Nah it won't make a vacuum leak but it may leak boost source pressure that should be going to the wastegate.
     
    My DSM:
    1992 Eagle Talon TSi AWD

    Street Build

    14b   automatic
    1990 Eagle Talon TSi AWD

    13.620 @ 108.460 MPH
    1990 Eagle Talon TSi AWD

    13.612 @ 107.760 MPH
    Loading...

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