Model selection feature on this site is messed up. My 2009 6.4L has 86,000 miles on it. On recent trip pulling 5th wheel the engine goes into power de-rate (limp) mode and check engine light comes on. 8 hour trip took 10 and I was sometimes only able to make 40 mph on interstate. Same deal on trip home (wasn't away long enough to have problem diagnosed and repaired). My dealership determined it was a pcv on fuel pump sticking. Had to replace entire fuel pump and it required cab removal! About $2800 total. Labor alone for cab removal and replacement is about 10 hours. Why on earth design a vehicle that requires cab removal for simple replacement of a critical part?
Ok this is my story. My first truck was a 2008 f250 5.4 cc the windshild had a bad leak and water got into the drivers side dash the truck developed some electricial problems so the dealership had to buy it back as a lemon. Thinking this was a fluke I bought another f250 sd cc 5.4 v8 two months later the windshild wipers would not turn off. The dealership told me it was a bad wiper motor. The gas mileage is bad at only 13mpg average. But hay you dont buy a big truck to worry about gas you buy it to haul pull whatever.The truck with the 5.4 is not a power house. I pull a 28ft travel trailer the truck has no problem susspenion wise but the 5.4 realy lacks the pulling power almost scarey