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Logic of the PCM

This is a discussion on Logic of the PCM within the Computer & Tuning forums, part of the LSx Technical Help Section category; So, if the O2 sensors on banks 1 and 2 are reading oxygen levels relative to a perfect mix of ...

  1. #1
    Member The Silver Goat's Avatar
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    Qucik Silver Metalic
    2004 GTO - M6

    Logic of the PCM

    So, if the O2 sensors on banks 1 and 2 are reading oxygen levels relative to a perfect mix of 14.7 to 1 and you are getting lean codes, are you running a rich mix?

    Think about it before you answer... The code sez lean, but lean on O2 is a rich mix correct?

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    Former Mopar Man 2002ssslp's Avatar
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    Silver & Blue
    02 Camaro SS, 04 GTO

    I would say you would have to be rich and or there is a leak somewhere. JMO
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

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    TunedbyFrost.com Tuner Frost's Avatar
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    Quote Originally Posted by The Silver Goat View Post
    So, if the O2 sensors on banks 1 and 2 are reading oxygen levels relative to a perfect mix of 14.7 to 1 and you are getting lean codes, are you running a rich mix?

    Think about it before you answer... The code sez lean, but lean on O2 is a rich mix correct?
    Mixture can still be correct at the pipe; the code indicates that the trimming has to move more positive than desirable to reach stoich.

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