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Sounds like your fuel pressure regulator. Check vacuum connection at fuel pressure regulator. That's the only easy check. the rest may have to be trial and error, i.e replacing fuel pressure regulator and then fuel pump if that doesn't work.
sounds like the injectors are not getting a signal to squirt or no fuel . Have a pressure test done on the fuel manifold to check pump, pressure regulator pressure and filters.. check injector connection to ECM
Generally, the computer only runs the pump long enough to start the engine and build oil pressure. After that, the oil pressure switch keeps the pump on, most of the time by supplying a ground to the fuel pump relay. This is a built in safety thing, when the engine isn't running, the fuel pump shuts off. Most public libraries have Chilton's manuals, or you could pick up a Hayne's manual at a store like Autozone. These books can help you locate the relay and oil pressure switch, as well as provide wire colors for your specific vehicle.
The fuel pump works off the engines oil pressure switch upon first starting the engine. That switch makes the fuel pump prime for the 5 seconds as well When the engine reaches the normal oil pressure the computer shuts that circuit off and turns the fuel pu,p relay circuit on to have the fuel pump to run until you shut off the engine
sounds like a fuel regulator or fule pump. your going to have to test the fuel pressure the port to hook a pressure tester is on the fuel rail. anything below 35-40psi you will need to prob replace regulator
On the top of the engine U will see a metal tube that is the fuel supply to the fuel injectors, it has round sockets that fit over the tops of the fuel njectors, on that rail is test port, it looks like a metal valve stem, you will need to hook up a fuel pressure test guage to that test port, you may be able to borrow one from Auto Zone or Kragen auto free, hook it up and drive the car until it stops then see if it has fuel pressure.