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  1. #1

    ECM Advanced Programming question

    I have a 2006 Sportster 155 with ECM problems (detects a fault with no fault code stored) also motor wont go above 5500 RPM. Borrowed another ECM and boat ran fine.
    I have BUDS software and under the advanced tab it has a section "Parameter Coding" where there are 6 bytes that can have a value of 0-255. They are labeled Byte 1 (PRG_ZW), Byte 2, Byte 3 (PROG_CO1),
    Byte 4, BYTE 5 (PROG_CO2), and byte 6.
    Does anyone know what these settings do? Is there a document somewhere that describes their use?
    Thank You

  2. #2
    Problem Solved. I was going to replace the ECM ($795 for a used one). Then it occurred to me that maybe the problem wasn't a malfunctioning EMC, but rather the data/parameters the ECM was using. I checked the above mentioned parameter coding on another ECM. The values were different from the values in mine. I reset Bytes 1,3, and 5 to the value 128 and wrote the changes to the ECM. The boat started up, no long beep, no check engine light and 7000 screaming RPMS on the motor. I suspect that maybe a low battery when trying to start the boat corrupted the user data area of the ECM. I hope this saves someone...

  3. #3
    Quote Originally Posted by wblocher View Post
    Problem Solved. I was going to replace the ECM ($795 for a used one). Then it occurred to me that maybe the problem wasn't a malfunctioning EMC, but rather the data/parameters the ECM was using. I checked the above mentioned parameter coding on another ECM. The values were different from the values in mine. I reset Bytes 1,3, and 5 to the value 128 and wrote the changes to the ECM. The boat started up, no long beep, no check engine light and 7000 screaming RPMS on the motor. I suspect that maybe a low battery when trying to start the boat corrupted the user data area of the ECM. I hope this saves someone...
    Great follow up! Thanks


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