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Thread: No MAF frequency above 1500 Hz

  1. #1
    Tuner in Training
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    May 2023
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    No MAF frequency above 1500 Hz

    Im eventually going to learn how to tune but for now, I dont have the time or patience to get my truck dialed in so going to have it tuned by a pro. I would like to make sure everything is working before I take it in. I was working on VE tuning but my LTFTs seemed to be getting further out of spec with each adjustment.... but I was getting a reading. Also tried MAF tuning but I dont seem to be getting a MAF frequency above 1500 Hz. I changed my MAF sensor, checked my wiring, have 5v to the yellow reference, 12v to the pink power supply & grounds are good. Is this something I need to correct or will it not matter when tuning with a wideband?

    if it matters, 2002 5.3 with 218/224 110lsa cam, long tube headers, no downstream o2s.

    Scanner log from my last start & tune it is under. Appreciate the help
    Attached Files Attached Files

  2. #2
    Tuning Addict blindsquirrel's Avatar
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    You have to add the channel for MAF Hz before it will show up in any charts/graphs. There is no MAF Hz channel in that log.

  3. #3
    Tuner in Training
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    I followed the instructions from goat rope garage on youtube. I just went back and did exactly what he says but maybe im missing something. Its the 2nd LTFT on my graph. No wideband so going the LTFT route

  4. #4
    Tuner in Training
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    Blinsquirrel man I swear Im not that dumb. I overlooked where you said "channel". So just added the channel & shes working. Thanks again

  5. #5
    Tuning Addict blindsquirrel's Avatar
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    And just so you know next time, nobody can see your graphs/charts the way you see them in your scanner unless you also upload the *.xml for your charts/graphs. A logfile is just the channel data. Opening somebody else's log in your scanner loads their data into your charts/graphs.