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Boost gauge leak

Posted by crazyquik22023, Aug 1, 2011

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  1. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    So have been having a problem where my car would not boost past 15psi. I found out the line broke on the back of my autometer boost gauge. So I probably was boosting past 15psi but the gauge just wouldn't read past it. Although I don't think I am boosting to what I should be though. I have a 6262 turbo, 1.1 bar wastegate spring and my hallman MBC turned up all the way. The car does pull pretty hard but I am guessing with the 1.1 bar and the hallman all the way up I should be boosting close to 30 psi, correct? And it definitely isn't boosting 30psi. My question is do you think that a leak (line was ripped in half so pretty big leak) coming form the line of the gauge to where I have it teed (FPR) would cause a big enough boost leak to affect boosting? I am fairly sure this is my only boost leak.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  2. MileHighDSM27

    MileHighDSM27 Probationary Member

    22
    0
    Joined Mar 10, 2010
    Denver, Colorado
    I wouldn't be surprised if that was it. I would definatley do a boost leak test though.
     
  3. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    I've done numerous BLT's. That is the only leak I can find. The test still will only hold pressure for a second like there was a massive boost leak. I'm just surprised a leak this small would cause symptoms like I am having but I'm sure it could.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  4. 9!'clipseDOHC

    9!'clipseDOHC Moderator

    3,456
    217
    Joined Aug 24, 2003
    El Paso, Texas
    Keep looking. If it's not holding your pressure, you have a leak. Find it.

    How do have you MBC vacuum lines routed?
     

    Street Build 3K  33

    1991 Mitsubishi Eclipse GSX
    13.102 @ 111.220 · 1G DSM
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  5. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    MBC lines are routed bottom to nipple on compressor housing and side to wastegate.
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  6. 9!'clipseDOHC

    9!'clipseDOHC Moderator

    3,456
    217
    Joined Aug 24, 2003
    El Paso, Texas
    Well thats good, just making sure. Keep checking for boost leaks. I find it's a lot easier with two people.
     

    Street Build 3K  33

    1991 Mitsubishi Eclipse GSX
    13.102 @ 111.220 · 1G DSM
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  7. crazyquik22023

    crazyquik22023 Proven Member

    610
    5
    Joined Sep 14, 2008
    Akron, Ohio
    Ya I know me and my buddy were doing it the other night. Sprayed everything down with soapy water compressor was set as high as 60-70 psi and still wouldn't hold. No leaks could be heard except for the one from the gauge line. No bubbles anywhere either. I'm not a newb when it comes to engine work or dsm's in general. I just posted this in the newbie forum b/c it's kind of a dumb question. :sneaky:
     

    850  0

    1998 Mitsubishi Eclipse GST
    12.900 @ 115.000 · 2G DSM
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  8. 9!'clipseDOHC

    9!'clipseDOHC Moderator

    3,456
    217
    Joined Aug 24, 2003
    El Paso, Texas
    I sure hope you are using a regulator and not running all 60-70 psi through your intake track. Fix the gauge line and then recheck.
     

    Street Build 3K  33

    1991 Mitsubishi Eclipse GSX
    13.102 @ 111.220 · 1G DSM
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