2012 F350 ford dually with 6.7 diesel

[richard_123]

neighbor in rv park having trouble with ford truck listed in subject line. pulls a toy hauler about 40 feet in length. had been using a programer on the truck which has 3 levels of performance. has programmer set level 3, the highest level of performance for power.

problem while pulling from Florida to mountains of Virginia the truck would be pulling along just if, and he would begin loosing power to the engine, have to pull over , shut engine down. when he sat a few minutes and restarted the engine and begin to pull again the scenario would happen again sometimes within minutes, other times hours. when he got to the RV park we looked at fuel filters very dirty--changed both. he reprogrammed the truck back to the least of the programs(1). drove truck without 5th wheel around the mountains, seemed to work fine. should we move the programmer setting back to top level and see the response. All this is being done without the toy hauler hooked up. or should we be looking at some other issues. He does not want to break down the 5th wheel till he is ready to leave. Any suggestions or anyone had similar issues?

[Cummins12V98]

He has already lost his warranty. He can remove the programmer but it leaves a trail.

He needs a sticker "I am my own warranty station".

Just because a fuel filter "LOOKS" dirty does not mean it is.

I agree 400 not enough? My measly 350 pulls 7% grades at 45mph and 6% at 55 at nearly 29K combined.

[kennethwooster]

I bought a truck that only had 12,000 miles to pull 5th. Ran perfect until I hooked up 5th. Thank it would loose all power after about 10 min.. It was a 6.4 navistar. Took to dealer and they could not fix the problem. Finally figured out through the service manager being honest that the truck had a chip at one time. 'told him I didn't want it and bought a 2011 with 6.7 Ford. That truck does not need a chip plus I figured out how bad a truck could be missed up with a tuner.

[Tennessee_Nomad]

I think some people use those programmers/chips just because it's a new gadget to put on their truck, without thinking about it actually "hurting" the performance or voiding the warranty. :S

[GoPackGo]

"problem while pulling from Florida to mountains of Virginia the truck would be pulling along just if, and he would begin loosing power to the engine, have to pull over , shut engine down. when he sat a few minutes and restarted the engine and begin to pull again the scenario would happen again sometimes within minutes, other times hours."

I don't think that's how dirty filters act. If clogged, after a forced shutdown the truck wouldn't run for only a few minutes and shut down again, then start up and run for hours. Especially when towing, which pushes a lot more fuel through them. There's something else going on.

And of course we don't know when the filters were last changed.

Tim

[kwlincoln]

From a guy who ran the Superchip on my last diesel and now drive a 2012 F350 - No #$%&* WAY would I put a programmer on these new trucks. Not needed and only asking to ruin the engine.

[stro1965]

My dad just went through something very similar with his '11 F350. Dealership had recently replaced his fuel filters and screwed something up, one of them had a bad seal.

[catfishmontana]

Mountains + Programer + toyhauler = defueling (my thoughts)

[Helmsey]

Get a code reader on it and see if there are any codes that are stored. I had issues with mine a while back and when hooked up to the code reader told me that there was low pressure in the secondary cooling system.

[TXiceman]

Ditch the tuner unless you want to destroy the engine. No need to a tuner with 400 HP and 800 ft-lb of torque.

Ken

[camperfamily]

I have a 2013 SRW version of that truck. The idea of wanting more power towing I just don't understand. I can travel at whatever speed I choose and acellerate going up most any grade. But that wasn't the OP's question.

It may be generating enough heat to cause the ECM to de-power the engine to prevent overheating. Of course dirty fuel filters don't help but I thought they would display a message about low fuel pressure also, not sure.

Good luck.

[Road_Runners]

Guys just gotta have their toys.

[GoPackGo]

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.

[drillking]

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

Yep, agreed!

[Powerdude]

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.