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Thread: AFV stays 100%

  1. #11
    Senior Member Cooter's Avatar
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    You don't have one, unless it was added by someone. It would be left side of the battery little black round thing plugged into the 3-wire triangular connector and a short ground wire.

    IMO, it would be BETTER to remove the FI and put on a carburetor than removing CL from any ECM. At least the carb will self-adjust for some atmospheric conditions where the now-hobbled ECM will not. There is NO REASON to run anything other than stoic targets in CL*

    *simplification warning

  2. #12
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    OK. Bump my own thread. After allmost a year.
    I reset all the ECM settings to the original settings and I loaded a fuel map from rev-mo.com, the "Race Tune for Stock Exhaust". This seemed like a good starting point.
    Thanks to being busy with all kinds of other things, I only got around to taking the Buell for a first ride with the new settings today. I have now also tried to log the data for the first time with ecmdroid and my buelltooth stick. Once home I installed megalogviewer and viewed the data. This is all new to me but it's cool that it can be done this way.
    What I don't understand yet is that I have logged about half an hour and it seems that I only see two minutes in the graph.
    Anyway, I was most curious whether that AFV value would change now. It did, and I wonder what this says about the condition of the engine. According to the graph, it started at 100, changed to 95, then changed again to 100 and then changed to 105.3. Is this normal behavior for the AFV?


  3. #13
    Senior Member Cooter's Avatar
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    Yes.

  4. #14
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    Ok! Great.

  5. #15
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    Not exactly, that 12750 value was for '02 Setup - Closed Loop - Limits - Minimum RPM'. For me it is now back to 600, as it should be originally.
    I expected the AFV to be adjusted in smaller steps, for example per 1 instead of per 5. That's why I asked here.

  6. #16
    Senior Member Cooter's Avatar
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    The ECM is taking cumulative data for a fixed time frame (number of steps*) then calculating and applying that adjustment percent (AFV) directly to the fuel map to reach the targets* desired. Whatever answer that is... is applied at that prescribed number of steps. Whether thats 1 or 5 or 10* etc.

    Yours is working as it was intended.

    * all adjustable.

  7. #17
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    Completely clear. Thanks for the explanation! Again

  8. #18
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    Thanks for all the support here from this forum. So much information to find. I've learned a lot lately about ECM and logging with buelltooth and editing settings from ecmspy and and. Never done this kind of thing on motorcycles but it is very interesting. And it makes me like my xb even more.

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