Stuck in tow haul mode (kinda)
#16
02-13-2019, 01:20 PM
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Fox my truck is a single wheel crew cab 250 4x4 and I got 18 -20 last night on 500 mile trip. Average came out to be 18 as I got in some hills. I think I may have the same issue you have with the gears. From what I gather does your truck want to inadvertently downshift on a gradual but long hill.? But my question is does it do this intermittently? That is what mine was doing last night and it bugged the heck out if me. Then it starts cutting fuel and all this when it does not need to. As if it were in tow mode and the dumass better idea electronics thinks you are pulling a load. All this in drive with.no load and I had not even backed off the throtttle at all. I let the thing roll on out in rolling hills. Cruise was not set either I never use the cruise in hills. Anyway let me know if your . Truck has these symptoms cause I am gonna research this and see what I can find out. And by your mileage that is the kind of mileage the farmers around home get with their dually farm trucks lisded down with tools. Does not seem like good mileage IMHO. Larry
#17
02-13-2019, 08:01 PM
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I wonder if you loaded a tune from say dptuner if it would correct itself. By description it sounds like e tow haul toggles on dash but trans strategy is consistent with tow haul all the time. Yes it should move to coast vs holding gears on decel
maybe ask them to overwrite the trans strategy, see if you can watch while this action is completed then go for second round of driving.
maybe ask them to overwrite the trans strategy, see if you can watch while this action is completed then go for second round of driving.
#18
02-14-2019, 05:54 AM
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Any chance your hubs are manually locked yet you are in 2H. With all the snow we've been getting I manually locked my hubs a while back and switched between 2H and 4H on the dash. Whenever I'm in 2H and the hubs are locked there is a noticeable "drag" when you let off the accelerator. The truck definitely doesn't coast like it would normally. I have no mechanical ability, nor do I pretend too. Just an observation good luck.
#19
02-14-2019, 01:23 PM
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Any chance your hubs are manually locked yet you are in 2H. With all the snow we've been getting I manually locked my hubs a while back and switched between 2H and 4H on the dash. Whenever I'm in 2H and the hubs are locked there is a noticeable "drag" when you let off the accelerator. The truck definitely doesn't coast like it would normally. I have no mechanical ability, nor do I pretend too. Just an observation good luck.
#20
02-14-2019, 04:58 PM
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My hubs are not locked. Just did a 30 mile highway drive and it is so irritating. I can not maintain a constant speed unless my foot is in the gas. As soon as I let off rpms just slow me down. Killing the gas mileage. I’m bringing it back in this Tuesday so hopefully it can get figured out. The part that scares me is there is no obvious sign pointing to it like a check engine light or anything. I just feel the dealers sometimes if they can’t plug something in to see what the issue is they just say no there’s nothing wrong with it.
#22
02-15-2019, 07:56 AM
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#23
02-15-2019, 11:10 AM
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#24
02-15-2019, 05:51 PM
Mountain Pass
i guess I suck at explaining this... put your truck in tow haul mode... drive it... transmission will lock when you let off gas and use that gear to slow you down rather then coasting. That’s how my truck feels all the time.
now get on a highway with tow haul mode on and cruise in say 6th gear (I have just been using that as an example this whole time it will happen in any gear) let off the gas (with tow haul mode on) the gear will slow you down, while the gear is slowing you down turn off tow haul and you will feel a dramatic change and rpms will drop and you will now coast rather then be slowed down by the gear.
My my truck is permanently being slowed down by the gears now coasting or rpm drop involved when letting off the gas
now get on a highway with tow haul mode on and cruise in say 6th gear (I have just been using that as an example this whole time it will happen in any gear) let off the gas (with tow haul mode on) the gear will slow you down, while the gear is slowing you down turn off tow haul and you will feel a dramatic change and rpms will drop and you will now coast rather then be slowed down by the gear.
My my truck is permanently being slowed down by the gears now coasting or rpm drop involved when letting off the gas
So I am not saying something is not different about your truck but you may need to reconsider your assumptions about what could be causing the problem.
#25
02-15-2019, 08:23 PM
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The truck did not always act this way there is definitely something off. Getting 13.5 mpg on the highways unloaded is not normal people can say winter fuel or what ever they want that’s not normal. I have had a 7.3 a 6.0 and 2 6.7’s and I have never experienced what I’m experiencing. On every other truck I have used tow haul mode on if you are cruising in 6 gear with tow haul on and let off the gas the gear will slow you down and as soon as you turn off the tow haul mode there is a dramatic change in rpm and how the truck coasts. There is no change with my truck at all. It was not always like this. I did an 80 mile trip last year in February with winter fuel all highway and got 19 something mpg.
#27
02-15-2019, 09:50 PM
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#28
02-16-2019, 03:18 AM
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Fox, I understood you completely as my truck intermittently does the. Same thing but my truck will only do this on a hill descent. There is always a resolution and it is a definite problem. Sorry to say I don't have better advice. I am going to keep eorking on it as I can. My first thing I would do if you can is contact DP Tuner because tuning could fix this IMHO.Oh and does your truck evver defuel when this happens?
#29
02-16-2019, 11:06 AM
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#30
02-16-2019, 05:51 PM
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You could try the ownerford.com website maybe they could help, I hope... They have been worthless in my dealings with them. I have contacted them about 40 times about my SYNC that has never worked and they know nothing. All they know to do is a master reset or turn the key off open the door lock the door and then try it again. Real brains in there at the www.owner.ford.com website, and the website is just as bad as the help. Then when that does not work and never has well it is"You gotta take it to the dealer." I told them like hale I will! They know me quite well I am their worst caller and all they ever did was torque me off.