boost leak?
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This is a discussion on boost leak? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I dont know whats going on.... my car will boost to about .08mpa than creep back down till about .05mpa ...

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    boost leak?

    I dont know whats going on.... my car will boost to about .08mpa than creep back down till about .05mpa than jump back up to .08mpa all between 5k-7krpm. I am new to the boost and not sure how to figure out how to fix or even diagnose it. Help please!

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    Luke Skywalker Mikie13's Avatar
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    Need to know what car, what year, what mods, etc. before we can help you.
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    op... my bad, its a 2004 wrx wagon with cbe, bov (came with the car), and strut bar "front". thats about it. and its got 124k miles on her

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    Subaru Newb MainFrame's Avatar
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    Aftermarket BOVs leak, more often than not.

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    Your thinking thats my problem?

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    Subaru Newb MainFrame's Avatar
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    It's a possibility.. I would perform a boost leak test for starters.

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    Toboggan T0rque's Avatar
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    boost leak?

    Quote Originally Posted by MainFrame View Post
    Aftermarket BOVs leak, more often than not.
    Yep.


    Lead Wrench @ WTF Tuning, LLC

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    Registered User SUBhuman's Avatar
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    Thanks guys! Thats a really good vid. Ill check everything out and keep ya'll informed.

  11. #10
    Moderator Donkey's Avatar
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    boost leak?

    Most leaks don't go up and down. They just flatten out and don't produce any more boost. Sounds like you need a tune or need to slightly adjust the waste gate arm (if it is adjustable). What you are seeing is referred to as "boost oscillations"


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    its just the stock wastegate... idk if thats adjustable

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by Cheets
    its just the stock wastegate... idk if thats adjustable
    '04 WRX, stock turbo, the wastegate arm can be adjusted.
    2005 WRX STi (Mods | Virtual Dyno)

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    K, sorry im such a noob. How do i go about adjusting it correctly?

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    Should i extend the arm or shorten it? And how far, like how many turns?

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    so i shortened the arm 1 1/2 turns and if stopped spiking so high than returning back but it seems like it is not boosting enough. It was boosting to about 13psi before and is now only boosting to about 10psi... what do you guys think?

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