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Thread: O2 sensor rich/lean chart

  1. #1
    Advanced Tuner Road's Avatar
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    O2 sensor rich/lean chart

    Is there a chart to reference rpm vs map vs load to use to adjust O2 sensor switching mv for fuel mileage I see a lot of people using lower numbers in the center three boxes but when I watch my nb histogram my 04 Tahoe seams to be running little higher up the chart at a steady lean cruise?

  2. #2
    Advanced Tuner Road's Avatar
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    I think I figured it out I made a histogram plotting maf lb/hr with maf kpa vs engine speed in the columns. Hopefully I can save a vcm scan and determine my airflow modes?

  3. #3
    Tuning Addict WS6FirebirdTA00's Avatar
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    You have to translate the airflow mode to an airflow. Use the lookup table in the tune for this.

  4. #4
    Advanced Tuner Road's Avatar
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    Thanks for the help. It sure is nice being able to tune to my liking instead of General Motors.