Loud squealing noise after tune / new exhaust
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This is a discussion on Loud squealing noise after tune / new exhaust within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have been using opensource to tune my car. I am adjusting my wastegate on my map due to over ...

  1. #1
    Registered User Ultimate's Avatar
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    Loud squealing noise after tune / new exhaust

    I have been using opensource to tune my car.

    I am adjusting my wastegate on my map due to over boosting and hitting fuel cut. I lower the wastegate to 50 and take it for a spin to see how it does. It runs fine at first and im not overboosting. I slow down and turn around and on the way back at around 60 mph I notice a loud wheezing squeeling air noise coming from the engine. This now happens constantly in 2nd-5th gear.

    It doesn't happen when the car is in neutral and I rev the engine.

    The performance is not affected just the loud noise.

    I recently put on a new stealth back exhaust.

    Could this be caused from an exhaust leak?

    HELP!!
    2006 Subaru WRX TR
    Stage 3

    HAWK-EYE ALLIANCE #25

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  3. #2
    Boba Fett BrianH's Avatar
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    sounds like a preturbo upppipe leak. Could be a boost leak as well.

  4. #3
    Registered User Ultimate's Avatar
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    Fix?
    2006 Subaru WRX TR
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    HAWK-EYE ALLIANCE #25

  5. #4
    Boba Fett BrianH's Avatar
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    Quote Originally Posted by Ultimate View Post
    Fix?
    find the leak and kill it!

    If it's an pre turbo exhaust leak you'll see carbon deposits building up around it pretty quickly.

  6. #5
    Registered User Ultimate's Avatar
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    I haven't even touched the uppipe so do you really think it would be coming from there?

    Where else could it come from?
    2006 Subaru WRX TR
    Stage 3

    HAWK-EYE ALLIANCE #25

  7. #6
    Boba Fett BrianH's Avatar
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    Perhaps it is a boost leak then, I'd check out and make sure everythings good with the connection to your IC. If you've got a plastic y pipe ensure that's not cracked as well.

  8. #7
    Moderator YBNormal07's Avatar
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    Did you use new gaskets when you put on the stealth back? Did you tighten all of the nuts/bolts for sure....especially the one towards the inside that is a major pain to reach?
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  9. #8
    Registered User Ultimate's Avatar
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    Yea, I am going to check them all again this weekend.
    2006 Subaru WRX TR
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    HAWK-EYE ALLIANCE #25

  10. #9
    Registered User Ultimate's Avatar
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    Quote Originally Posted by BrianH View Post
    Perhaps it is a boost leak then, I'd check out and make sure everythings good with the connection to your IC. If you've got a plastic y pipe ensure that's not cracked as well.
    Im using the stock y-pipe.
    2006 Subaru WRX TR
    Stage 3

    HAWK-EYE ALLIANCE #25

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