Need some help folks.
2001 f-350 7.3.Sorry for long post. I really need some help. Started running sluggish, couldn't hardly pass a car. picked up camper and it wouldn't pull at all. Changed out filter and tried again, still wouldn't pull. Next morning I drained the tank thinking bad fuel and added seafoam conditioner. Tried to pull again and worked fine until exhaust temp got to 650. Started missing and running on what seemed like 4 cyls. Unhooked camper and ran the truck to get a new fuel pump. Ran fine and tested ok. Put camper on it again and same trouble. When the temp gets to 600-700 it starts having a fit. Brought to shop and they ran a scan and it showed no codes until I took a test ride with computer hooked up and the #3 injector showed a failure. Changed out, no help. Scaned again and showed fuel sensor bad changed it out, no help. Does anyone have any ideas?