Strange problem......I have a 2001 F-250 7.3 that will start up, idle and drive approximately 10 miles and then it will act as though it is running out of fuel. I have replaced the lift pump and checked the filter. If I punch the throttle it will accelerate and then start to act the same way earlier than 10 miles. I am really stumped. there is plenty of fuel getting to the filter bowl and I just cant seem to figure it out..........any ideas???? Thanks.