Won't run between idle and full throttle after it warms up

It is Fuel injected. It just dies between idle and full throttle but not completly. The engine still blubbers like it is flooded (but no smoke from the tailpipe) but is not strong enough to keep going unles you floor it or let it idle. I did put a new fuel filter on it with no inprovment. I also checked the fuel pressure which shows good when sitting still but it normally only acts up when being driven. I also checked the throttle position sensor for.8 volts at idle which was correct.

Thanks for the good information but it has two fuel pumps. One low pressure in tank, one high pressure outside tank. How do I tell which pump might be bad?

Problem fixed and had nothing to do with electronics. I was driving home and truck was running perfect. I turned on the vent blower and engine quit between wot and idle again. I thought what just happend? So I turned off the blower and it ran perfect again. Thought about it for a few miles then turned on the headlights and the engine quit again. Turned them off and it ran perfect again. Now I knew it had to be in the power distrubution and started at the battery. When I got home I replaced the 6 gauge battery cables with 2 gauge cables. Now for the last week and a half it runs perfect all the time even with the headlights and AC on and better gas milage too. All this time I have been fighting with, cursing at and hating ford electronics when it was a battery cable. Always in the past when there was a bad battery connection or cable on a car it would affect the starter not start fine but affect something else. Now I love the truck again and have a whole bunch of spare sensors for the furure.