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Thread: turbo lq4 closed loop problem

  1. #1
    Tuner in Training
    Join Date
    Feb 2014
    Posts
    32

    turbo lq4 closed loop problem

    I put a turbo on and both 02 sensors are togather after the turbo. When i scan one goes lean and one goes rich on the fuel trims. I wired one of the 02s up, can they read back words if wired wrong if not that could one read diffirent because it is on the other side of the wastegate dumb to the colletor .
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  2. #2
    Advanced Tuner
    Join Date
    Sep 2011
    Location
    Portland, OR
    Posts
    518
    I don't recall anyone making that work.
    The system doesn't know what to do with each bank.
    They need to be placed pre turbo. Right off the end of each manifold works excellent.

  3. #3
    Tuner in Training
    Join Date
    Feb 2014
    Posts
    32
    Thanks will give it a try. I put them there because my wideband says it had to b on down pipe side. Makes sense to put them on each header through they need to control each bank. Has any body tried running one o2 senser for both banks.