It starts fine and runs but only for a few minutes. replaced fuel pump, filter, pressure regulator valve. i would let it sit for a while and start it up and it dies again after a few minutes still.... i dont know what it can be.
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Check or replace fuel filter again. You could have had a lot of sediment in your tank. If it ran good for a week, that's where you need to start figuring out what was replaced during that time. If you can, check fuel pressure at schraeder valve on fuel rail.
Could be a fuel pressure regulator not working. Thus ecu complaining about fuel Pressure. probably not enough because the regulator is worn and leaking down so will not maintain the proper pressure. You will need to google the make model and fuel pressure regulator to find it's location or library and repair manual. Otherwise, you need to measure the pressure and find the spec for the required fuel pressure. Probably somewhere around 120PSI
I would check the fuel pressure regulator. If you pull the vacuum line off the regulator (truck not running) and fuel comes out of the line, the regulator is bad. The other answer would be that you may have enough fuel pressure to start the truck but it may not be strong enough to keep it running. I'd suggest doing a pressure test on the fuel system. If this is a gas engine and not diesel, I believe the pressure should be around 50 psi.
replace the fuel regulator,its about a $50.00 part and takes about 15 minutes to change,but first relieve the fuel pressure and you can do it in a couple of ways,hitting the fuel pump shut off swith(inertia switch)until the red button pops up,but remember to reset it when done,located either behind the passengers side kick panel or under the carpet in the middle under the dash then start it to run it out of gas which there will still be a little bit in the lines,...or drain it at the valve to check for pressure it looks like a valve stem for a tire.