boost fluctuation
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This is a discussion on boost fluctuation within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Please help I am having a real bad boost fluctuation on my 02 wrx. At wot boost build up a ...

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    boost fluctuation

    Please help I am having a real bad boost fluctuation on my 02 wrx. At wot boost build up a little over .1mpa then back to .05 then back to .1 and you can feel it in the car. Car has dc sports tbe. 06 turbo and ic bov doesnt recirculate back to turbo other than that all stock. Any idea can help thanks.

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    Master Baiter EJ257's Avatar
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    Stock tune?
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning

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

    UNYSOC

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    Yes stock tune I was told restrictor pill or bcs. Just trying to get a little more certainty of which it could be.

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    Registered User Heide264's Avatar
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    Quote Originally Posted by mikeytitito View Post
    Yes stock tune I was told restrictor pill or bcs. Just trying to get a little more certainty of which it could be.
    Are you looking to stay stock? Do you have the ability to do any data log?
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
    2011 STi Build Log
    -Part 1 - Reading, Data Logging, and Analyzing Data
    -Part 2 - Turbocharger 101 & Basic Boost Control
    -Part 3 - EcuFlash, Experimental Defintions, and a Drive By Wire Intro

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    For right now yes. No I don't. In the near future cobb ap.

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    Registered User Heide264's Avatar
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    Quote Originally Posted by mikeytitito View Post
    For right now yes. No I don't. In the near future cobb ap.
    Without any form of data logging, it's a bit hard to troubleshoot (at least for myself).

    It looks like you have a much larger turbo and IC on the car, but didn't change anything else but the BOV. If that is the case, I wouldn't be surprised if your engine was pulling massive timing and/or you are out of fuel injector. Did I understand your mod list correctly?
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
    2011 STi Build Log
    -Part 1 - Reading, Data Logging, and Analyzing Data
    -Part 2 - Turbocharger 101 & Basic Boost Control
    -Part 3 - EcuFlash, Experimental Defintions, and a Drive By Wire Intro

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    Well the turbo is from an 06 wrx still a tdo4 from what I was told and so is the intercooler from an 06 wrx. The bov is also stock just doest recirculate back to turbo turbo inlet is plugged on recirculation hose.

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    Registered User Heide264's Avatar
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    Quote Originally Posted by mikeytitito View Post
    Well the turbo is from an 06 wrx still a tdo4 from what I was told and so is the intercooler from an 06 wrx. The bov is also stock just doest recirculate back to turbo turbo inlet is plugged on recirculation hose.
    Gotcha. I'm not familiar with the bugeyes, as you can infer. If the turbo is the same size, then you should be okay.

    Did this suddenly start happening? Or was it gradual over time?
    Quote Originally Posted by Trainrex
    He was throwing balloons filled with sulfuric acid and shrapnel at the swat team. They finally had to take him down with rubber bullets.
    2011 STi Build Log
    -Part 1 - Reading, Data Logging, and Analyzing Data
    -Part 2 - Turbocharger 101 & Basic Boost Control
    -Part 3 - EcuFlash, Experimental Defintions, and a Drive By Wire Intro

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    Ever since I got ive had it for about 6 months. Everytime at wot boost fluctuates pretty bad.

  11. #10
    Master Baiter EJ257's Avatar
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    My guess would actually be either the pill or the wastegate actuator. Do you know anyone who has an '02/'03 WRX in your area with the stock turbo on it?
    2005 WRX STi (Mods | Virtual Dyno)

    Resident Tuner @ WTF Tuning

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

    UNYSOC

  12. #11
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    Yeah. I heard about that too what do I do to the wastegate actuator? something about turning it or I dont know. Do you know anything about that?

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