i own a 04 powerstroke 6.0 which i maintain routinely as it says in the manual and even better, its got 95,000 miles, i dont tow nor pull but lately its been stahling/bucks and at times wont respond on acceleration it will just idle, change out all filters/and oils and no check engine showing looking for answers to what it might be please feel free to throw in your 2 cents its been acting up more lately .

 

check the connectors at the fuel pedal if you have a multimeter you can check it out that way allso hope this helps