Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › ECM Calibration

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  • April 1, 2020 at 2:24 pm #95723

    Richard Dodson
    Participant
    Vessel Name: SWAY
    Engines: 6CTA 8.3 480
    Location: Kent Narrows, MD
    Country: USA

    As part of rebuilding one of my 480s after an exhaust valve seat failure, I had planned on having the ECU updated to incorporate the light load stumble update. In speaking with the Cummins folks I asked if it would be possible to code the ECU to a slightly lower horsepower output. He wasnā€™t completely sure, but thought it might be possible. Does anyone (Tony) have any information that this is possible and would it help de-tune the 480 so we can keep the valve seats where they are supposed to be?

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  • August 2, 2020 at 11:27 am #101732

    Richard Dodson
    Participant
    Vessel Name: SWAY
    Engines: 6CTA 8.3 480
    Location: Kent Narrows, MD
    Country: USA

    re-cal

    Cummins in MA was kind enough to send the cal harness that fits the ECM to my local Cummins dealer. They updated to the latest update. We’ve been back in the water, after rebuilding one engine and swapping the head on the other. No idle stumble/shutdown and the idle seems smoother than it used to be. Update the ECMs was good advice.

    April 3, 2020 at 4:06 pm #95799

    28Cuttyhunk
    Participant
    Engines: 6BT-220 QSB-5.9
    Location: Massachusetts

    ECU Re-configuration

    Cummins Northeast in Dedham Massachusetts can re-calibrate the ECUs off engine. about $300 per.

    April 3, 2020 at 10:14 am #95781

    Richard Dodson
    Participant
    Vessel Name: SWAY
    Engines: 6CTA 8.3 480
    Location: Kent Narrows, MD
    Country: USA

    Stumble issue

    Upon further review…..Decided to forget seeing if the ECU could be updated to reduce the HP, but having experienced the un-commanded shutdown, decided to have the ECUs updated which would incorporate the anti-stumble. The ECM code on mine is Y90002.02, one of the initial ones. After speaking to the Cummins guys, I removed the ECUs and took them to the local shop. After looking, they said that they do not have the bench CAL harness to update these ECUs. Further they could not locate one in the Cummins system. Unless one exists and I can locate where, the only avenue is to have them update the ECUs while they are installed in the boat. Looking at paying mileage and everything else, it may approach $2,000.00. Any info on this would be appreciated.

    April 2, 2020 at 6:25 pm #95769

    JJM
    Participant
    Engines: Cummins 480 CE
    Location: CT
    Country: United States

    I would also recommend as I am doing from the same failure to install some EGT gauges at the dash. They will tell you the real story of whats happening down there from the load.

    April 1, 2020 at 9:15 pm #95733

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    Only one “REAL” answer. that is guaranteed to make it right.. ……………Prop down to where the engine loads at or below the “450 curve” at 2100-2200 RPM.. Do that, and then, all the rest will take care of itself..
    If you want to listen to some other way to solve your issue, all I can say is, good luck..

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