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Thread: MAF Tuning Help LNF experienced Tuners please Help

  1. #1
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    MAF Tuning Help LNF experienced Tuners please Help

    My MAF is all messed up. I have been trying to fix it using the MAF output vs frequency table but to no avail and I am stuck please help me. Thanks.
    Last edited by Terminator2; 06-16-2009 at 08:35 AM.

  2. #2
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    Anybody?

  3. #3
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    What exactly is the problem? I don't see anything in the log that would tell me your maf is messed up.

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    Quote Originally Posted by shabby View Post
    What exactly is the problem? I don't see anything in the log that would tell me your maf is messed up.
    According to my histograms my LTFTs are -5 and my STFTs are all over the place between -18 and +25.

  5. #5
    Senior Tuner 5_Liter_Eater's Avatar
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    If you don't have a way to turn off LTFTs (which I don't think you do after looking at your tune) then don't even bother looking at STFTs. If the LTFT averages are within +-5% then you're good.

    I don't know how you guys tune these things, there are soooo many blank screens. You would freak if you looked at my tune and all the settings I can change. Sorry to rub it in...

    PS: WTF does LNF stand for?
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  6. #6
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    Quote Originally Posted by Terminator2 View Post
    According to my histograms my LTFTs are -5 and my STFTs are all over the place between -18 and +25.
    That's normal, the stft will fluctuate like that in some parts of acceleration/deceleration.
    If you want to add fuel in specific load/rpm points use the base maf correction table, increasing the number add's fuel and decreasing takes away fuel.

    Quote Originally Posted by 5_Liter_Eater View Post
    PS: WTF does LNF stand for?
    Thats the 2.0L direct injected turbo motor found in the solstice/sky/hhr/cobalt.

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    Quote Originally Posted by 5_Liter_Eater View Post
    If you don't have a way to turn off LTFTs (which I don't think you do after looking at your tune) then don't even bother looking at STFTs. If the LTFT averages are within +-5% then you're good.

    I don't know how you guys tune these things, there are soooo many blank screens. You would freak if you looked at my tune and all the settings I can change. Sorry to rub it in...

    PS: WTF does LNF stand for?

    Thanks and yes we have only two MAF tables and 13 total tables but we have a factory wideband so no VE tables to mess with at least. They are really easy to tune even for a first time tuner like myself. The LNF is the 2.0L Turbo Direct injection motor on the Cobalt SS Soltice and Sky and HHR SS.

  8. #8
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    How do you shut off DFCO for tuning? it seems to be screwing up all my numbers.

  9. #9
    Holy post raised from the dead batman. I was like... "Umm term asking about maf tuning, whats going on here"

    If you don't want DFCO, 0 out the torque management inj disable table

  10. #10
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    I'm fairly new to all this and I know this is what they had to do on LSJ to get it dialed in but is this the right way to go about it for the LNF? Is there a better way to get clean results?

  11. #11
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    Screwing up what numbers? Like Ch1ck3n said http://www.hptuners.com/forum/showthread.php?t=28714