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Thread: 17 Camaro LT1 running very rich

  1. #1
    Potential Tuner
    Join Date
    Jan 2020

    17 Camaro LT1 running very rich

    I did a Cam swap, valve springs, pushrods, AFM delete, long tube headers, MSD atomic air intake, E85 kit, 3600 circle D stall. Had the vehicle light tuned and drove it about 150 miles and noticed a raw fuel smell coming from the exhaust Past few days driving and when tuner tuned it, stayed between +10 & -10. Today CEL popped on with P0068 & P0101. Checked fuel trim and found Bank 1 and Bank 2 short term fuel trim is at +31% at idle. no vacuum leaks found, LTFT is turned off. Found O2 sensors for bank 1 (bank 2 is shut off) is at 20-40mV.

    Any thoughts of what could be causing this issue? and yes im running stock O2 not a wideband O2 sensors

  2. #2
    Join Date
    Dec 2019
    DFW, TX
    +31% would mean its running lean, not rich. And I hope you mean that sensor 2 for each bank is turned off, not bank 2 as a whole is turned off. Post a file

  3. #3
    Senior Tuner SultanHassanMasTuning's Avatar
    Join Date
    Nov 2009
    All Around
    you would need to post the tune, could be that you have e85 in your tank and ethanol is not setup properly
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  4. #4
    Tuner Camaro6's Avatar
    Join Date
    Jun 2018
    Sounds like you need it retuned. PM me if you're interested in having that done remotely or in the chicagoland area.
    2018 Camaro SS, LT4 Fuel System, LT4 S/C