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Wastegate problems... please help!

Discussion in 'Performance and Tuning' started by 19CQuest, May 9, 2008.

  1. May 9, 2008 at 10:08 PM
    #1
    19CQuest

    19CQuest [OP] Member

    Joined:
    Apr 22, 2008
    Member:
    #6137
    Messages:
    7
    CT for two months, then San Diego
    Vehicle:
    07 PreRunner SR5 TX Edition
    STS 60-1 Turbo Kit Vortech FMU Walbro 255 Autometer ES Vac/Boost, and Oil press. AEM UEGO Rockford Fosgate 3002 300W Amp Pioneer 12" 350W Sub Extang Roll-up bed cover
    I have a 38mm Tial Sport Wastegate on my truck and it's leaking considerable exhaust at idle. This can't be normal right? Even with this it still seems to boost quick so I don't know what gives. I thought it may just be a spring problem so... I bought a new one and installed it, same thing. Is this normal? I'm scheduled to dynotune tomorrow but I know if this isn't right it could affect my tune. Any input is appreciated!
     
  2. May 10, 2008 at 8:28 PM
    #2
    pumo420

    pumo420 Well-Known Member

    Joined:
    Feb 2, 2008
    Member:
    #4537
    Messages:
    83
    florida
    Vehicle:
    07 Prerunner Sr5 Debadged
    silver star headlights, optima yellow top battery, 2X10 mtx thunder 4500 speakers, kicker kx 400 amp, pioneer headunit, injen air intake, flowmaster dual exhaust, doug thorley long tube headers. waiting to put on urd maf caliberater, urd o2 senser, urd supercharger and 7th injector setup.i Fell
    well i found 2 sites that might be able to help you out. i got one from vwvortex the guy was a 38mm tail waste gate and it sounds like he has the same problem as you. even though its a completley different vehicle it could be helpful.

    http://forums.vwvortex.com/zerothread?id=3702712

    heres the 2nd site one turbo trouble shooting guide you know

    http://www.turbochargedpower.com/Troubleshooting.htm

    How does a Wastegate work?
    A Wastegate is simply a turbine bypass valve. It works by diverting some portion of the exhaust gas around, instead of through, the turbine. This limits the amount of power that the turbine can deliver to the compressor, thereby limiting the turbo speed and boost level that the compressor provides.

    • The Wastegate valve can be "internal" or "external". For internal Wastegates, the valve itself is integrated into the turbine housing and is opened by a turbo-mounted boost-referenced actuator.
    • An external Wastegate is a self-contained valve and actuator unit that is completely separate from the turbocharger.
    • In either case, the actuator is calibrated (or set electronically with an electronic boost controller) by internal spring pressure to begin opening the Wastegate valve at a predetermined boost level.
    • When this boost level is reached, the valve will open and begin to bypass exhaust gas, preventing boost from increasing.
    i would call customer service and ask what gives. just tryin to help you know.
     
  3. May 11, 2008 at 9:07 AM
    #3
    19CQuest

    19CQuest [OP] Member

    Joined:
    Apr 22, 2008
    Member:
    #6137
    Messages:
    7
    CT for two months, then San Diego
    Vehicle:
    07 PreRunner SR5 TX Edition
    STS 60-1 Turbo Kit Vortech FMU Walbro 255 Autometer ES Vac/Boost, and Oil press. AEM UEGO Rockford Fosgate 3002 300W Amp Pioneer 12" 350W Sub Extang Roll-up bed cover
    Thanks a lot for the response. It ended up being a bad valve seat... The shop hooked me up with one and I was able to dyno as planned:cool:
     
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