turbo , help !
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This is a discussion on turbo , help ! within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey I got a wrx 02 with 102,450 miles. I changed the timing belt + water pump. About turbo, When ...

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    turbo , help !

    Hey

    I got a wrx 02 with 102,450 miles. I changed the timing belt + water pump.
    About turbo, When i m acceraleting , the car is going fast pretty good until the RPM hit 5000 tr/min , i can felt the power is down but little bit ( like i'm on the cruise) but after around 5900 tr/min RPM , the power comes back.
    In result , i lost power between 5000 rpm and 5900 rpm.

    What problem could be?

    no engine light ON.

    Except i got a engine light ON, when i stay around 70 and i want to go fast , the engine light appear and it looks like the engine cut the power for 1 sec . the engine light disappears couple days later.

    But before that, i didnt notice the lost power between 5000 and 5900 rpm.

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    UnBanned Sinister's Avatar
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    do you have the code for the check engine light?

    That would be fantastic.
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    Moderator   Sasquatch's Avatar
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    Turbo boost gauge readings would also be helpful - do you have one?
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    UnBanned Sinister's Avatar
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    Off topic: Bill... I'm embarassed that you have twice as many posts as I, but have been on here only 2 years longer. I need to start the "sup" thread back up.
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    got my engine light code is P 0244

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    dony have any gauges, not yet =p

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    P0244 - Turbo Wastegate Solenoid “A” Range/Performance

    I'd check wiring and / or vacuum lines.

    Quote Originally Posted by Sinister View Post
    Off topic: Bill... I'm embarassed that you have twice as many posts as I, but have been on here only 2 years longer. I need to start the "sup" thread back up.
    I'm a reformed post wh0re.

    PLEASE ... no more "sup"!
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    Quote Originally Posted by Sasquatch View Post
    P0244 - Turbo Wastegate Solenoid ďAĒ Range/Performance

    I'd check wiring and / or vacuum lines.



    I'm a reformed post wh0re.

    PLEASE ... no more "sup"!
    I dont know much about wrx , it is my first wrx, it is stock

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    Quote Originally Posted by azn77 View Post
    I dont know much about wrx , it is my first wrx, it is stock
    This started immediately after the timing belt water pump job? I'd guess the solenoid wiring was never reconnected or the vacuum line was incorrectly hooked up.

    I'll see if I can dig up some more definitive info ...
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    UnBanned Sinister's Avatar
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    Just to elaborate... p0244 is the "Overboosting" code. What this means? It means that the wastegate isn't allowing exhausting of the gas around the turbine wheel before the computer detects an excessive amount of boost. IE "Overboosting". It can also mean that your wastegate isn't able to vent off enough exhaust gas, and the turbine is still able to produce additional boost above the computer's requested amount (called boost creep)

    This can be a few different problems.
    One... your wastegate is stuck closed.
    Two... Your boost control solenoid is stuck closed.
    Three... There's a problem with your tune, and the wastegate isn't opening soon enough.
    Four... Your car is experiencing boost creep beyond what the wastegate can bleed off.
    Five... there is a manual boost controller installed between the turbo compressor housing and the wastegate, and it's not performing correctly.. or has been adjusted incorrectly.
    Six... The restrictor pill is in the solenoid's hose instead of in the compressor hose.

    What're your mods?


    (bill... with no electricity keeping the solenoid closed, our subaru EBCS's stay open. This is why a broken, or unplugged solenoid creates only 7psi - wastegate pressure)
    Last edited by Sinister; 10-19-2011 at 05:06 PM.
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    Quote Originally Posted by Sasquatch View Post
    This started immediately after the timing belt water pump job? I'd guess the solenoid wiring was never reconnected or the vacuum line was incorrectly hooked up.

    I'll see if I can dig up some more definitive info ...
    the engine light code p 0244 was here before changing timing belt.
    where is the vacuum line?
    i m novice sorry lol

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    UnBanned Sinister's Avatar
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    Read my above post azn77.

    Then... read this:
    CobbTuning.com - How Subaruís Factory Boost Control System Works

    If you don't feel comfortable tackling this... you may need to talk to a mechanic, or find a local with a ton of experience.

    Also... please list your full modification list.
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    Moderator   Sasquatch's Avatar
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    Quote Originally Posted by Sinister View Post
    Just to elaborate... p0244 is the "Overboosting" code. What this means? It means that the wastegate isn't allowing exhausting of the gas around the turbine wheel before the computer detects an excessive amount of boost. IE "Overboosting". It can also mean that your wastegate isn't able to vent off enough exhaust gas, and the turbine is still able to produce additional boost above the computer's requested amount.

    (bill... with no electricity keeping the solenoid closed, our subaru EBCS's stay open. This is why a broken, or unplugged solenoid creates only 7psi - wastegate pressure)
    You are better than me at explaining this.
    Last edited by Sasquatch; 10-20-2011 at 12:44 PM.
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    UnBanned Sinister's Avatar
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    I had a fudge in my post that I corrected before you quoted it... can you fix it for me? switch open and closed in your quote.

    And I'm good at explaining this because I've had the problem myself and did a lot of research. For me... it was an aggressive tune in the summer causing overboosting in the winter.
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    Quote Originally Posted by Sasquatch View Post
    You are better than me at explaining this.
    the engine light came before timing belt changed.
    When i bought the car 2 months ago. i tested on hwy and it was the first time the engine light came up.

    after that , i put a filter k&n

    after the timing belt changed , i added the grimmspeed pulley + mishomashi hoses for radiator

    And now , i have a lost power between 5000 to 5900 rpm for all gears.

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