Need advice on "Defueling Coolant" - Dodge Cummins Diesel Forum
3rd Gen. Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 07-09-2011, 05:59 PM Thread Starter
JasonDykstra's Avatar
Join Date: Feb 2009
Location: Prescott Valley, AZ
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
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.

07 2500 5.9L 4x4 megacab. K&N filter, BullyDog GT tuner, muffler delete, leveled, 18in motometal rims w/34inch terra grapplers
JasonDykstra is offline  
Sponsored Links
post #2 of 3 (permalink) Old 07-09-2011, 08:47 PM
Diesel Head
mkwelds's Avatar
Join Date: Mar 2011
Location: Desert, CA
Posts: 1,925
Thanks: 207
Thanked 203 Times in 186 Posts
iTrader Score: 3 reviews
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

2004.5 3500 4x4 NV5600, PDR Cam, ARP 425s, industrial injection 60 horse injectors, Raptor 100 fuel pump, DIY 2micron fuel filter system with big line upgrade, HE351 over S475,more brewing
To view links or images in signatures your post count must be 3 or greater. You currently have 0 posts.
SMARTY S06 and UDC fine tuning all of it
To view links or images in signatures your post count must be 3 or greater. You currently have 0 posts.

Last edited by mkwelds; 07-09-2011 at 08:56 PM. Reason: spelling sucked
mkwelds is offline  
The Following User Says Thank You to mkwelds For This Useful Post:
Newbi ram canadian (02-01-2016)
post #3 of 3 (permalink) Old 07-09-2011, 11:21 PM
Diesel Head
macko300exc's Avatar
Join Date: Dec 2007
Location: Mentor, Ohio
Posts: 3,157
Thanks: 260
Thanked 560 Times in 403 Posts
iTrader Score: 0 reviews
What you need to do is change the defuel set point for coolant temp. My Triple Dog will do this with the monitor.

04.5 Silver 3500 Quad Cab, Long Bed, Dually, 4X4, NV 5600, Intake Horn, Bully Dog Triple Dog, High Idle, FASS 150/150And A MANIAC Behind The Wheel!
macko300exc is offline  
Sponsored Links
Closed Thread

Quick Reply

Register Now

In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome