04 sti to much fuel
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This is a discussion on 04 sti to much fuel within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; 04 sti dont know what previous owner did to this car. i am unable to find him. anyway iv installed ...

  1. #1
    Registered User
    Join Date
    Apr 2010
    Location
    middleboro mass
    Posts
    9

    04 sti to much fuel

    04 sti dont know what previous owner did to this car. i am unable to find him. anyway iv installed a wideband 02 guage the car is running to rich, 10.5. can i adjust fuel pressure or do i have to install a pressure reg, i so what do you recommend? also the wastegate is opening to soon im looseing boost, prevs owner pust another spring on the arm to try and keep gate closed but that is just a micky mouse job i would like to fix the right way. it is an artermarket turbo but not sure what kind or size. any and all input would be great thanks

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  3. #2
    Registered User Stitches's Avatar
    Join Date
    Feb 2010
    Location
    The Woodlands, TX
    Posts
    103
    I would go get a tune on the car. Even if the ECU is stock, you can get an OPEN SOURCE tune to get the AFR in check

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