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Thread: MM3 EGT Reads 3717.9 Degree

  1. Top Of Page | #11
    I WILL STAND! AK Bob's Avatar

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    Re: MM3 EGT Reads 3717.9 Degree

    Great research, thanks for sharing.

    It does look like the one on order should work.

    Looking forward to your update.

    Also please include the complete P/N as ordered.

    Hopefully this will give us a source for just the thermocouple without having to purchase the whole kit.


    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, 50 Gallon auxiliary fuel tank.

    Sent from my iPhone using Tapatalk

    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.

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  3. Top Of Page | #12
    Skywrench's Avatar

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    Re: MM3 EGT Reads 3717.9 Degree

    The latest one I ordered is here:

    https://www.amazon.com/gp/aw/d/B01KD...b_b_prod_image


    2016 3500 Laramie Mega DRW Aisin 3.73


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  5. Top Of Page | #13
    Skywrench's Avatar

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    MM3 EGT Reads 3717.9 Degree

    I received the pyro probe from The Sensor Connection yesterday. Checked it with the ohm meter to make sure it was un-grounded and then hooked up the probe wires. Sensor was reading pretty close to the same temperature as the weather app on my phone. I installed the probe into my exhaust manifold. It comes with a different style fitting than the original MM3 fitting. See comparison of old and new sensor below.
    IMG_2996.jpg
    On the new sensor, the threads on part of the fitting that screws into the exhaust manifold are the same as the original but the threads on the other end are different. The sensor tube on the new one is slightly smaller. You must use the new fittings that come with the new sensor if you want to avoid leaks. In my opinion, the fittings that come with the new probe are a better design anyway. The new sensor also comes with longer wires (maybe 10-12 inches longer).


    2016 3500 Laramie Mega DRW Aisin 3.73


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  7. Top Of Page | #14
    Skywrench's Avatar

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    Re: MM3 EGT Reads 3717.9 Degree

    Went for a short drive and so far, it is working great.


    2016 3500 Laramie Mega DRW Aisin 3.73


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  9. Top Of Page | #15
    I WILL STAND! AK Bob's Avatar

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    Re: MM3 EGT Reads 3717.9 Degree

    Great news! . Thanks for the update and info on the probe compression nut threads. When you connected the new probe to the existing MM3 connecting block did you add spade connectors or simply wrap the wires under the screw heads?


    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, 50 Gallon auxiliary fuel tank.

    Sent from my iPad using Tapatalk

    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.

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  11. Top Of Page | #16
    Skywrench's Avatar

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    Re: MM3 EGT Reads 3717.9 Degree

    I bought some small spade connectors and crimped them on. Cost like two bucks for a small box at the local hardware store.


    2016 3500 Laramie Mega DRW Aisin 3.73


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  13. Top Of Page | #17
    MOD watersupply189's Avatar

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    Re: MM3 EGT Reads 3717.9 Degree

    Great news!

    Thanks for the update.


    2016 Ram 3500 CC 4x4, G56, Dr. DRD medically cured

    2016 RAM 3500 4x4 Laramie Crew Cab
    Cummins,G56, Rough Country level, Morimoto LED fog lights, LED headlights, Lund Attitude Steps sprayed with Line-X, DRL's Activated, 35x12.50R18 Falken Wildpeak ATW3, Fuel Vapor Wheels Matte Black w/Dark Tint, A.R.E. Truck cap and swing boxes

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  15. Top Of Page | #18

    Re: MM3 EGT Reads 3717.9 Degree

    Thanks for posting this.

    Found it with a search as mine just did the same thing after only around ten months of being installed.

    I noticed it would occasionally spike up to 3717.9 for a short period, then go back to reading normal over the last few weeks, then finally pegged out at 3717.9.

    EGT info from the mm3 screen also indicates an open loop.

    I ordered the same probe posted above

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