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?
