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  1. 09subisti

    Elusive boost leak

    Anywhere from 5psi-20psi max. I could hear the air coming out somewhere but I could not find it at all.
  2. 09subisti

    Elusive boost leak

    I'm pretty sure the leak is only under boost. The car idles fine. But at this point I'll try anything haha. Thank you!
  3. 09subisti

    Elusive boost leak

    Hey guys, so for the past week or so I've been trying to find a significant boost leak after I had just bought my 09 STi, and I've tried my boost leak tester with soapy water but only found a small leak. Not the one that I'm loosing 3-4 psi out of. I cant see it, or feel it while testing. Ive...
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