I have a 1999 f350 6.8 l v-10 and am having problems with it skipping really bad when trying to acclerate. have changed plugs and several coil packs but no help. i have changed fuel filters as well still no help. i do notice the problem to be worse in the middle of the day when the truck sits in the sun than it does early in the morning. when i was changing out the fuel filter i had my wife cycle the key and noticed that the gas was not under any real pressure coming out of the feed line from the tank it just kind of flowed out not very much volume either could my fuel pump be weak and causing all of this trouble