Hello, you need to check the fuel pressure regulator, it is a very common problem on these trucks. The fuel pressure regulator is located on the drivers side fuel rail, it is a round valve with a vaccum line coming out of it. After you run the truck, shut it off and pull the vaccum line off, you are checking for fuel leaking out of the regulator, if you have any sign of fuel, it needs to be replaced. Let me know if you need more advice, Please hit accept if i helped you, thanks