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Thread: MM3 must be plugged in for tunes higher than 1? *newbee*

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    brentbrennan's Avatar

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    MM3 must be plugged in for tunes higher than 1? *newbee*

    I know you can run the vehicle with the tuner unplugged. However, if one wishes to set the truck for a 90HP tune, once unplugged, does the ECM revert back to the "stock" tune?

    By stock, i'm not meaning the MOPAR stock, but the baseline starting point programmed tune.

    My H&S reverts to "stock" upon 3 key cycles.

    Also, if you unplug the tuner, does the ECM dethrottle/defuel the engine should a parameter get out of whack?

    Like coolant temp above 220 degrees F, or EGT over 1250F?

    The H&S only has the ability to detune if it's plugged in.

    Just wondering if the MM3 from DRD is the same or is the ECM tune truly able to manage the engine without the tuner plugged in?


    Brent


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    RamIt's Avatar

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    Re: MM3 must be plugged in for tunes higher than 1? *newbee*

    No the MM3 should maintain the last tune loaded.


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    cumminsdieselfreak's Avatar

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    Re: MM3 must be plugged in for tunes higher than 1? *newbee*

    Quote Originally Posted by brentbrennan View Post
    I know you can run the vehicle with the tuner unplugged. However, if one wishes to set the truck for a 90HP tune, once unplugged, does the ECM revert back to the "stock" tune?

    By stock, i'm not meaning the MOPAR stock, but the baseline starting point programmed tune.

    My H&S reverts to "stock" upon 3 key cycles.

    Also, if you unplug the tuner, does the ECM dethrottle/defuel the engine should a parameter get out of whack?

    Like coolant temp above 220 degrees F, or EGT over 1250F?

    The H&S only has the ability to detune if it's plugged in.

    Just wondering if the MM3 from DRD is the same or is the ECM tune truly able to manage the engine without the tuner plugged in?


    Brent
    The MM3 will keep whatever tune file you select until you change it. As for defueling on coolant/egt temps, to my knowledge it won't and is the responsibility of the driver to monitor temps.

    Current: 2018 2500 G56 Off Road. 2.5" RC Leveling Kit W/ 35" Cooper AT3 XLT. LUND Camper Cover W/ Thule Roof Rack. DRD Happy. AFE Magnum Stage 2 Intake. 5" Stainless Exhaust. Lost Some Weight At 920 Miles. Amsoil 5w-40 Signature Series & Amsoil Oil Filter @ 1,300 Miles.
    Sold: 2013, 2007.5, 2007, 2006, 2002, 2000
    For whosoever shall call upon the name of the Lord shall be saved - Romans 10:13 KJV

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