Need advice on "Defueling Coolant" - Dodge Cummins Diesel Forum
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Old 07-09-2011, 05:59 PM   #1 (permalink)
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Need advice on "Defueling Coolant"

I need some help here. When I am towing up a steep hill the engine sometime start to cut power because the temp starts to climb. I have a bullydog GT tuner and when I looked at it it said "defueling Coolant. The programmer is in tow mode (low power) but after coolant temp climbs past 210 degrees the programmer goes to no power (stock). It will still give some power but slows down to about 50-55 MPH. This did this while programmer was off also and even does this in tow mode. Anyone heard of this before and is it normal or do I need to have it looked at? Only happens when I tow.
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Old 07-09-2011, 08:47 PM   #2 (permalink)
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I think its more like defueling because of coolant temperature. So go down the list is ur radiator full if so does thermostat work all good there replace the temp sensor and so on and so on. Its basically the engine trying to protect itself and what the gauge shows on the dash might not be the actual temp so thus might be saving ya from some serious issues. Just sounds like u have a colling issue so find it and fix it and that'll fix the defueling. Oh and also before any of that check the settings on ur programmer they might be set to shut down at that temp in which case u need to change it to a more realistic number like 240 or 245just cause anymore than that u will be pushing ur luck big time and even that's hot for what normal is temp is
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Old 07-09-2011, 11:21 PM   #3 (permalink)
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What you need to do is change the defuel set point for coolant temp. My Triple Dog will do this with the monitor.
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