My dad had some crazy stuff going on with his 6.0 today. We live on a ranch 54 miles from town and today he was on his way to Alb. with a trailer to get some feed and his truck started vibrating and loosing power before he got to town. So he went straight to Ford and they put two injectors in it and reprogramed it and sent him on his way. Well he got his load and headed home, probably drove about 150 miles and it started doing it again, he said by the time he got to the ranch 15mph was top speed! So tomarro he is going to have it towed to the dealer. Could these injectors be going bad from bad diesel? He said his water in fuel light has never come on. He is sure glad he bought the 200k extended warranty, no deductable and they tow for free! Anybody else had these symptoms? I have had 2 6.0's and have never had one act like this. I will post what they find out tomarro.