this is scaring me...

[horsemaster20]

Thanks for the welcome guys

OH S**T...something odd started happening today:
...this ain't cool 50 miles from home with 4 horses
after coming up a long hill pulling about 10K lbs worth of trailer. It was about 85 degrees out (i heard the clutch fan working) i then stopped at the top of the hill to make a turn. When i hit the pedal again to make the truck go IT BOGGED DOWN, NEARLY STALLED AND STARTED PUMPING BLACK SMOKE OUT THE EXHAUST.
I PUT IT IN PARK PUT IT IN DRIVE AGAIN AND IT RESUMED NORMALLY. it did it again 5 minutes later on a similar hill with a turn. (yes I was in "D" both times ... and in "tow/haul")
It has no problems under load on the highway...only when it stops
Im hoping not to cook my turbo. But i also dont want to get soaked at a dealership
any suggestions...chip?...intercooler?

[460+]

What year is the truck?

[elibenson]

I am guessing that your turbo is coked-up, and needs to be cleaned. Or that your EGR valve is stuck open. Actually, the EGR valve is more likely. You really shouldn't mess a turbo up pulling that bit of weight up a hill. I used to pull 40K (truck trailer and hay) up hills with a 6.0l and never cooked my turbo.. Hold on a second.. Come to think of it, I did get a turbo replaced under warranty. Either way, I was really abusing it when mine quit working on me. It still *worked*, but the truck wouldn't have any pick-up (turbo boost low) till the engine warmed up. The VGT parts were sticking till the engine got warm. Your engine was already warm, so I am thinking that it might be an EGR issue.

[Ryan Rønning]

What engine is it, also what chip and all the other stuff ya got. I assume its not to old if you are talking about having the dealer fix it!

[horsemaster20]

sorry, should have posted this info:
The truck is an '04 F350
98K miles,
stock chip...no modifications
past major work: head gaskets replaced, turbo line replaced, injectors replaced

[Davey~do]

My bet is on EGR as well. Either clean the one you have or just go to the dealer and buy a new one to replace it with. That might be the easiest way out. You can always clean your old one then and have a spare to keep with you. We tow a bit smaller load 250+ miles quite frequently and I know how you feel. Would be nice to have the spare at the far end of the trip when you need it.