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Old 12-17-2017, 04:20 PM   #26
mugen_
Scooby Newbie
 
Member#: 471151
Join Date: Jul 2017
Location: Huntington Beach, CA
Vehicle:
2011 WRX sedan
Dark Gray Metallic

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I had this exact same issue a few weeks ago. Found the leak on the coupler hose under the TMIC. The clamp wasn't tight and the seal blew out.

STINY11: The sound will become a loud wooshing sound around 3000-3500rpm. It's the pressurized air escaping after the turbo. It only happens when you go into boost, so no it won't happen at low rpm. If you hear this sound stay out of boost until you get the leak fixed. Take it to a shop to do a boost leak test, or if you or a friend are mechanically inclined, do a DIY boost leak test at home.
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