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Thread: MEFI 4B Tuning

  1. #1
    Carb and Points!
    Join Date
    Jun 2019
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    1

    MEFI 4B Tuning

    Hi, I have been searching for a while for options to tune the Mefi 4B ecu in a Malibu boat.
    I contacted mefiburn and was told to send ecu to him to be tuned, when I asked about purchasing software was basically told the ecu is locked and I have no other options than to send ecu to him. I am in Australia and would prefer not to send ecu away and attempted to ask other questions like can he read ecu or does he just write over the top to which I never go an answer.
    Does anyone have any more information that can help me proceed?
    my questions are, does anyone have passwords to read the file from the ecu or can it be bench read to get stock file?
    If not does anyone have a library of stock files and based from part numbers are they available?
    I have changed camshaft and need to alter fueling and raise idle.

  2. #2
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    6,307
    Possibly the information in the attached .zip file will be helpful.

    Files.JPG
    Attached Files Attached Files

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