my truck was ran low on fuel and it developed problems accelerating and going over 2000rpm especially even up a slight hill, changed the fuel filter and re-bled the system. it starts and runs fine until you either need to get over 40mph or are on a slight incline then it behaves like it has fuel starvation. does anyone have any ideas? fuel lines look ok, but is there a tank filter if so where? any help would be greatly appreciated, thanks!