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Thread: 05 5.4 maf tuning.

  1. 04-19-2017 #1
    Rigo_eff1fitty
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    05 5.4 maf tuning.

    ok I am tuning a 05 5.4 with a tune I found in a repository. truck is running lean so I have multiplied the maf in some areas by 15 percent and some other areas up to 25 percent. I do not know much about tuning. but I think my maf curve don't look right after I modified it here is the log of the vehicle and the tune in the vehicle .also their is the tune with the maf modified. any pointers and hints
    heber current tune.hpt
    heber file1.hpl
    heber maf modified.hpt
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  2. 04-20-2017 #2
    mstang_man
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    What Is your setup? 05 5.4 Stock MAF? Stock Injectors? just looking at your File, the MAF curve needs adjustment
    Last edited by mstang_man; 04-20-2017 at 09:16 AM.
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  3. 04-20-2017 #3
    15PSI
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    Use the scanner format I sent you. Populate the STFT and LTFT charts fully. Once you have good data in the charts, it is simply a matter of copy and paste. Remember when you log the truck, to get as many cell hits as possible in the different columns and rows.
    2012 Mustang GT with S/C
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  4. 04-22-2017 #4
    kleistang
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    Quote Originally Posted by 15PSI View Post
    Use the scanner format I sent you. Populate the STFT and LTFT charts fully. Once you have good data in the charts, it is simply a matter of copy and paste. Remember when you log the truck, to get as many cell hits as possible in the different columns and rows.
    Can I bother you for that scanner format. I was able to do this the other day by using the stock maf table and adding % to it until i got to 25% which got me the stft at 0, but i keep reading ppl use the method you are suggesting.

    Thx in advance.
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  5. 04-22-2017 #5
    kleistang
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    Rigo, you have some values on your graph that are a little apart from each other, when you see that you can try selecting selecting the odd value and the 2 closer to it and use the interpolate function to help you smooth the line. Also if you notice at 4.49volts your airflow value is lower than the to other values next to it. that is why it looks like it drops and then its way off. you might try adding a % to the entire table to get you started then the method that 15psi suggests which I am sure gets you to 100% dialed in.

    Try this to start.

    0
    0.56368351
    0.667636469
    0.857888162
    0.985387489
    1.298697442
    1.61767751
    1.932453811
    2.236136198
    2.539314926
    2.846043706
    3.155804873
    3.812362552
    4.469432533
    5.079703927
    5.665698647
    6.259275079
    6.877906322
    8.107313514
    10.49997926
    11.69636607
    12.93662548
    16.58492446
    21.03966236
    26.61837578
    29.42262411
    34.89903688
    43.1035614
    48.45592499
    57.65713692
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