bank 1 lean condition

Discussion in 'The Safe Zone' started by shinobmatt, Sep 29, 2014.

  1. shinobmatt

    shinobmatt New Member

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    ok so i replace the injectors with 24#er's new O2 sensors in the front (long tube Headers) mil eliminators on the rear O2's (not replaced). this motors has XE274 comp cams. also new 75 mm throttle body, and intake elbow, screamin demon coils. i know i will need a tuner but is there any reason i am missing why bank 1 is lean n bank 2 is ok?
     
  2. shinobmatt

    shinobmatt New Member

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    so now the codes are bank 1 lean and bank 2 rich.. any suggestions?
     
  3. 96blak54

    96blak54 Legend

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    Intake leak?
     
  4. shinobmatt

    shinobmatt New Member

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    no vacuum leaks i could find. every possible place i could reach i checked.
     
  5. CC'S95GT

    CC'S95GT Legend

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    What motor?
    I'm assuming a mod motor since you have front and rear o2's.
     
  6. shinobmatt

    shinobmatt New Member

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    yeah mod motor. 4.6. i have an adjustable fuel regulator but the factory 1 looks like it is part of the fuel rail. i dont see any nuts, screws, or bolts holding it on. n i thought maybe i need a better fuel pump also. been looking for vacuum leaks replaced a buncha vacuum lines that had dry rot. right now i am stumped on what else other than a tune.
     
  7. CC'S95GT

    CC'S95GT Legend

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    any other codes? it's possible to have one set wothout the cel being on
     
  8. shinobmatt

    shinobmatt New Member

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    cel does not work got these codes when i hooked up my code reader after i drove around the block. P0171 was 1 and can remember the other i erased on accident before i could wright it down.
     
  9. rz5.0

    rz5.0 Legend

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    Check make sure you have no exhaust leaks. .
     
  10. 96blak54

    96blak54 Legend

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    I got nothin
     
  11. rz5.0

    rz5.0 Legend

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    Could also be that is trying to compensate for extra fuel and it's leaning out too much. ..
     
  12. shinobmatt

    shinobmatt New Member

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    Ok so an update.... switched the O2s to see if my lean/rich condition changed sides.. we pulled the passenger side O2 it looked good (was a new 1) and when i pulled the driver's side it was all gummed up from fuel (i guess why it was running rich on bank 2). so i tried to clean it as best i could. also changed the IAC. so now it runs with out sounding like it is missing. but now the idle surges pretty good. any ideas? (dyno tune set for my birthday wknd!!)
     
  13. D3VST8R96GT

    D3VST8R96GT Well-Known Member

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    best of luck