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; While on the road tuning today, the tuner noticed that car was at full Wastegate Duty and only was making ...

  1. #1
    Registered User KenFerrari13's Avatar
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    Boost Leak ?!?!?

    While on the road tuning today, the tuner noticed that car was at full Wastegate Duty and only was making 11 PSI and was tuned for 16 PSI. Leading us to believe that either the turbo was going or there was a boost leak. Anyone know any common places for a boost leak to occur. I thought maybe that BPV was on its last leg or just a leak on one of the lines.
    Car: 2004 WRX

    Thanks Ken

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    Master Baiter EJ257's Avatar
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    The tuner didn't have any pointers for you on where to look? Datalogs would give us a good idea on where the potential leak may be.

    Three locations to check are: uppipe, turbo inlet, and BPV gasket.
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning, LLC

    "Never trust anything that bleeds for a week and lives ..."

    UNYSOC

  4. #3
    Registered User KenFerrari13's Avatar
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    Can a cracked inlet cause the car to not hit target boost even though inlet is pre compressor housing?
    Last edited by KenFerrari13; 11-26-2013 at 10:10 PM.

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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by KenFerrari13
    Can a cracked inlet cause the car to not hit target boost even though inlet is pre compressor housing?
    Yes
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning, LLC

    "Never trust anything that bleeds for a week and lives ..."

    UNYSOC

  6. #5
    Registered User wreckingball man's Avatar
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    Get it tested or build your own tester if there are no obvious signs of a leak, like a cracked inlet. Then you will know for sure where the leak is or if you have one at all.

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    did you ever get to the bottom of this?

  8. #7
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    Check your inlet tube from the intercooler to the throttle body. Mine popped off at the throttle body causing the boost to lag and the engine to run rich, leading to backfires and poor throttle response under load. You will porbably have to remove the intercooler to get to the throttle body side though. Worth checking cause it doesn't cost you anything!

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