Update on weird tow/haul glitch

[jcurtis934]

Well, no codes were logged. Excellent dealer in Prescott, Az in Galpin Ford. They verified that manual does say that cruise control shouldn't be used with tow/haul, at least on the 2012 and I would assume other years. Chevy/Ram, who knows guys/gals! My truck really needed a de-carb service. And I had them replace all fuel filters as well as rear diff and transmission fluid exchange as extra assurance. If you remember on another post, I made comment of not seeing the exhaust cleaning message since the reprogramming for emissions. I did see one driving truck solo down out of manitou springs when we took it to visit friends there. And I have never seen the truck getting in the 20 mpg range solo since it was a few months old. WELL, after the vivit to Galpin, the truck was really quick to start, ran very well barely touching the pedal in town, and seemed to have a re-birth. Saw 26 mpg logged driving 45-50 mph on mostly level terrain heading upslope back to I40. Saw 18-20 in more upslope sections. Of course, that dropped to 16.7 on I40 with the continual uphill battle to 7000 ft at 73-74 mph...but it wasn't 10!! SO, I will conclude that I had a case where the computer didn't play nice between cc and t/h! Now, I am lusting bigtime over the exhaust braking ad on to the new ford trucks. Maybe it is time to install the newly released BDdiesel exhaust brake electronics that does what the new trucks do... happy john

[1retired06]

Surprised. We have used cruise control/tow haul on our 6.7 since new with no issues whatsoever running combined.

[Fire5er]

Another cruise control with Tow Haul user here. Did it with the 6.0L and with the 6.7L since new...so far so good. Don't use it in the mountains.

[jcurtis934]

And I used it as well and only had the one occurance. So I think it is something you have to do what feels right to you. Computer software will always have cases where odd things can happen given the right set of circumstances. I just happened to stumble into one. I won't use it on the big grades along with tow/haul...at least not by intention...the old brain may do it by accident. John

[awaywego]

I use cruise cont. going down grade. If the speed gets 5 MPH over setting it down shifts to lower speed to slow it down. Works for me.

[washley1]

Another vote here in favor of cc + tow/haul. It has been a wonder in the Smokies and the Rockies, both US and Canada!