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Thread: Maf Tuning help wanted

  1. #1
    Potential Tuner
    Join Date
    May 2020
    Posts
    3

    Maf Tuning help wanted

    Can someone please explain to me why I can?t get the maf to tune properly, I?ve set up the tune to maf only with DTCO off and COT off Dynamic airflow off and p0103,p0102,p0103 to MIL on 1st error. I was previously using LTFT?s only for the correction then taking the data then copy then paste special multiply % half then the next log it will be lean then the next will be rich then the next lean so then I disabled the LTFT?s and now running off STFT?s only getting the same results
    4B19D039-CDF2-4805-8759-FC4F63D8942B.png 1st log lean

    E856D65A-9E10-4BBF-A39B-B546BADB6249.png 2nd log after applying the previous log paste special multi % half

    A7A1B066-C61B-46BD-8451-1B1C59B6686B.png 3rd log after applying the 2nd log paste special multi % half

    2A07EA23-A806-4C16-817F-2D9D54CA10B2.png 4th log after applying the 3rd log paste special multi % half

    I just don?t get why it?s doing this

    maf stft 1.hpl
    maf stft 2.hpl
    maf stft 3.hpl
    maf stft 4.hpl
    AIDAN SS MAF TUNING .hpt

  2. #2
    Tuner in Training
    Join Date
    Aug 2020
    Posts
    35
    Cant open your tune right now, but looks like your setup for Maf only is incorrect. Start by changing the P0 mil's back to stock. You make those changes when you are trying to fail the MAF and go SD to tune VE. Think you got the directions mixed up between modes. After that i would verify you made the correct changes to disable dynamic.

  3. #3
    Setting these DTCs to MIL on first error should only be done when failing the MAF and tuning VE. When tuning either MAF or VE your engine temp should raise to normal operating conditions. Make sure your not entering PE mod as well. Use a wideband.