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Thread: E35B Digital MAF Scaling

  1. #1
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    Default E35B Digital MAF Scaling

    Hi all,

    Would it be possible to get a cax file to modify the E35B Digital MAF tables?

    I'm looking to run a new style GM digital MAF with a higher a 12k HZ frequency range. I verified the E35B ECM will read up to 14818 Hz, but table B0205 currently ends at 8696Hz. If supplied a frequency above 9200Hz, the G/s reading falls to zero. So it appears to be running out of resolution in that table. The new style sensors should work fine if table values can be aligned.

    Thanks

    -K

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  2. #2
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    It may actually be a protection. There is likely some sort of threshold that when hit or crossed over it defaults to 0 g/s thinking the sensor has failed. That would be where you need to look. IMO

  3. #3
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    I think it's just running off the end of the scale. But like you said, it would set an out of range code for certain. Reason I would like to adjust the scale and test it. Any help with finding that line would be greatly appreciated. Just bench testing at the moment, then I have a half dozen ECM's to upgrade.

  4. #4
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    Ross, What was the deciding factor for EFI live to not map the axis for MAF digital {B0205}? Is it hardcoded somewhere? Similar to mapping counts in the Cummins stuff.

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    Don't think he's stumbled onto this thread yet. Maybe we should PM him a link to it?

  6. #6
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    Anyone have the A2L file for this OS to share?

  7. #7
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    Quote Originally Posted by kidturbo View Post
    Don't think he's stumbled onto this thread yet. Maybe we should PM him a link to it?
    Yeah sorry I do tend to miss a lot of threads on here.

    Quote Originally Posted by SASDakota View Post
    Ross, What was the deciding factor for EFI live to not map the axis for MAF digital {B0205}? Is it hardcoded somewhere? Similar to mapping counts in the Cummins stuff.
    I don't remember, it was 10 years ago

    I have a feeling we actually hard coded those axis values in to the software from whatever was in the stock files (I know that is not ideal), but maybe we hadn't sorted out the axis displays back then and it never got revisited.

    Can either of you do .cax files? I'm happy to tell you where the axis is for a given OS and you can add it in yourselves (I'll just post it up here). I am a bit reluctant to go and add this in to EFILive then regenerate the E35B .calz files again. I did do them back in Feb this year and it was a big pain to have to check over everything.

    Cheers,
    Ross
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  8. #8
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    I've added a cax file for MAP scaling to this OS before, so probably could handle it with a little reading.

    Thanks

    -K

  9. #9
    Forum tyhee Site Admin GMPX's Avatar
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    Let me know the OS and I'll save you the trouble (I'll PM the details).
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  10. #10
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    12628594

    Since I all ready use this build with a MAP scaling mod, please let me know if any special tricks to using multiple cax files in same tune file.

    -K

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