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Thread: Maf freq not readed

  1. #1
    Potential Tuner
    Join Date
    Feb 2019
    Posts
    7

    Maf freq not readed

    Hi,

    i want to tune my GMC tahoe 2012 with maf sensor, Iwas disable LTFT and Deceleration fuel also Cat Converter, Now i need to adjust maf freq table at vcm editor but VCM scanner not showing to me MAF freq reading i don't know why... can any one help me I will attach tune file also vcm scanner log file... thanks
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  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    You are not logging the MAF Hz channel, that is why.

    Add the MAF Hz channel and it will start reading, the make a graph/chart to log the data you want.

    You still need to set the dynamic airflow high rpm disable to something like 200/100rpm so it doesn't use the MAF and VVE together. Also the short term fuel trims need to be disabled if you are tuning with a wideband sensor.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.