2012 F350 ford dually with 6.7 diesel

Guys just gotta have their toys.

I'm confused too. I have a 2013 and I can pull my 14,000 pound trailer as fast as I want to - uphill or on the flats. I got all the HP I want.

I hope nothing is really wrong because it will be expensive and his warranty is now toast.

BB_TX wrote:
Get rid of the programmer. The 6.7 does not need it.

Yep, agreed!

What's the point of the programmer on a 400 hp, 800 ft/lbs truck, other than reading codes?

How much power does the guy really need while sacrificing reliability?

If it's still under warranty, and he takes it into Ford, it will be instant warranty invalidation, because he modified his truck.

They can usually tell if it's been chipped because the chip creates different spray patterns and different cylinder wear patterns.

Get rid of the programmer. The 6.7 does not need it.

Another possibility is that his HPFP may not be able to keep up with providing fuel for those constant high HP runs. With Ford's latest 6.7, they actually stroked the HPFP to provide the fuel volume needed to maintain 440hp in a tow situation.

Hank85713 wrote:
I believe that the majority of programmer instructions indicate to NOT use the highest setting when towing! I dont have a programmable tune, but the reading I have done indicates so. He may be defueling due to high egts which he would not know if no gauges are present. try the high setting without towing and see what happens, but tow in the tow or low to mid setting would be a better idea.

X2

I believe that the majority of programmer instructions indicate to NOT use the highest setting when towing! I dont have a programmable tune, but the reading I have done indicates so. He may be defueling due to high egts which he would not know if no gauges are present. try the high setting without towing and see what happens, but tow in the tow or low to mid setting would be a better idea.

It seems like you described the problem that he had very well.

He bought fuel from a dirty source, and has already solved the problem by replacing the fuel filters.

Chances are unless he has run the fuel tank down near 1/8 full, that there is still a bunch of dirty fuel still in the tank. My suggestion is to run the fuel tank to around 1/4 tank or so the next couple of times, to use up as much of the old fuel as possible.

Setting the power to stock or '3' will have little change in the quality of fuel in the system. He will probably need to change the fuel filters in another 3,000 miles once all the 'bad' fuel is gone. This will return the system to factory new performance! Restricted fuel filters can make a diesel run really bad. From what you described, there was a lot of junk in the fuel, or perhaps some bacteria growing in it.

If he parks the truck for long times, then completely fill the truck with fuel. More important, get some fuel additives to kill the bacteria and prolong the fuel life and add this as you are filling the truck, say 1/4 full, then add the stuff, and continue to fill with fuel, to mix it all together.

Worst thing to do to a truck is leave the tank 1/2 full in a humid part of the country for several months. Each day the air in the tank expands as it warms up, then contracts at night, drawing in more humid air, allowing moisture to enter the system.

Good luck!

Fred.

Fred.

What does all his aftermarket gauges say is going on? He does have gauges when tuned that high and pulling that heavy, right?