No fuel at start up

Anti-theft system ! The engine computer controls the injectors ! What make , model an year ? Engine size ?

Sounds like either the Mass Air Flow Sensor could be dirty or defective OR a simple vacuum leak.
To check for a vacuum leak, get a can or injector cleaner or even WD40, and spray around the intake until you hear a change.
To clean the MAF sensor, BE SURE to get sensor cleaner NOT carb. cleaner!!
Or, you can take it to Auto Zone and have the "Codes" checked FREE.
Hope that helps. :-)

What's the mileage of your car? Your fuel injectors could be dirty. The cause of that is putting bad gas in your car. Like no name gas stations with cheap gas. Go to a machine shop in your area and ask if they have an injector flow testing machine. Having them cleaned will probably get rid of the problem. Since you've already replaced everything fuel related I wouldn't doubt that it's clogged injectors being restricted when you start needing more fuel in the cylinders.

not to sure on model but could be injectors or the inbjector pump not fuel pump as this only send fuel to engine injector pump send fuel to injectors hope this helps

FIRST YOU NEED TO RELIEVE FUEL SYSTEM PRESSURE BY REMOVING FUEL FILLER CAP THEN DISCONNECT FUEL PUMP HARNESS OR UNPLUG FUEL PUMP CIRCUIT RELAY, THEN START ENGINE LET IT IDLE UNTIL DIE LACK OF FUEL.TO REMOVE FUEL INJECTOR YOU NEED TO REMOVE FUEL DELIVERY PIPE WITH FUEL INJECTORS AS A ASSEMBLY TO REMOVE FUEL INJECTOR.YOU NEED TO TAG NUMBER ALL VACUUM HOSES AND PCV VALVE,NUMBER TAG FUEL INJECTORS WIRE CONNECTORS SO YOU CAN PUT EVERY THING BACK IN RIGHT PLACE.

Injectors need cleaning, As being left for time its got dirty, Run a fuel system cleaner through the fuel, Or get an professional to clean injectors for you with a high pressure unit.

Replace you fuel Injector pump and check for any bad or clogged injectors. make sure idle adjustment screw is properly set

Best do a fuel pressure test. Should have chg. fuel filter from the get go. The only other filter is on the end of the fuel pump in tank. Bad gas and dirty gas will plug up fuel filter, hense burn pump up.

Sounds like the injectors may be bad or just really dirty. You say that the truck is only used as a plow truck, so I would assume that it sits alot. If you dont add any fuel stabilizer to the tank, the fuel will start to degrade and the will gum up your injectors. One thing you can do is to pull the air cleaner assembly off and look at the injectors while the truck is running. Look at the bottom of the injectors while it is running. The injectors shouldbe spraying fuel with a fan spray of fine mist. If you see any drips of fuel in the this fine mist, that injector is at least dirty or on its way out. I would recommend that you change your fuel filter and then get some fresh fuel and the purchase some Seafoam fuel injector cleaner from your local parts store. Dont mess around with anything else. GET SEAFOAM. If it is in a plastic bottle it is not strong enough to do anything. Seafoam is in a metal can. Dump the seafoam in and run the truck as much as you can. This will help clean out the injectors.

This injector set-up needs a specific fuel pressure supplied to the fuel rail to even start, much less run properly. The fuel pump is immersed in fuel inside the gas tank to keep it cool and not burn up. Running the fuel level low causes more heat in the pump and interuptions in proper fuel pressure. AC/Delco pumps have proven to be a reliable fix, the aftermarket pumps only last for a month or two sometimes. Check fuel pressure under the hood and power and ground to fuel pump at electrical harness at top of gas tank. This truck needs a fuel pump.