Thanks for the replies Mark. By codes I meant, could I have one or more of the above going bad or broken (especially the more specific ones....sensors, etc) without the mechanic's computer picking up and DTC's. Basically...the other day I had the mechanic that I've been recommended too check things out...he said that the truck wasn't producing any error codes at all. He checked the turbo boost as the primary suspect of my complaints (he drove it down the road with the computer hooked up....at WOT the turbo pulled 25 psi every single time...he said that was good and that's what it's supposed to do). I haven't ever had any CEL's since I've had it.
I also found the thread below at powerstroke.com....read through it....I haven't ever experienced great power with this truck (I bought it in 10/08) and then noticed a loss of power....it's been performing like this ever since I've had it...I just noticed it more when I started towing a camper with it...especially up a 3 mile 6% grade....bogged down to 38 mph. with the pedal on the floor. That's what made me start questioning if something was wrong. Now after testing with two other F250's (actually one was an F350)....I realize that my truck is definitely NOT performing the way it should/can. Here's the thread:
2005 6.0 F250 4x4 no power - Ford Powerstroke Diesel Forum
