I purchased new a 2004 Ford Excursion w/ 6.0 diesel, now has 58,000 on it recently it would loss power like starving for fuel. I put the pedal to the floor and it would idle for a short period, then stall. The first three times before it would stall I would shut it down, then restart it usualy fine. The last two times in one hour period I almost could not get it to run.Ford had up dated the fuel pump to run after the truck has been shut off about a year a go. Receantly changed 2 fuel filters but I might try that again. Any other advise u might have.

It should have a heui fuel injection system so it can be because of oil pressure

It was as simple as changing the fuel filters. I change them regularly but never experienced a symtom like this, must have gotten a few bad loads of fuel. I used a clean clear 2 gallon container and drained the water seporator first (located in the chassis rail under the driver floor, (7mm. allen key) about 2 quarts came out slowly because I did not remove the plug completly until it was empty,(10 minutes on level ground) then removed the water seporator filter, pain in the *** with 4 whheel drive.
Removed old filter and used a whole can of brake parts cleaner in allen key hole as well as filter orfice, lots of rust, debri, and muck. That was not enough I whiped out filter housing (messey) and put a small magnet into the water drain several times until clear.Reinstalled new filter and water drain plug. Turned ignition to on position and listen to fuel pump prime up until it stopped,(about a minute or two) started the engine
and let run for one minute, shut down and changed the filter under the hood. It's important to do it that way because after cleaning all the gunk out of the water seperator filter the left residue will collect into the fuel injection filter. Results were awsome. Like a new truck. Never expected it to be a filter problem because I service it regular.P.S. the clear container contained no water, but rust, dirt, and alot of algie.