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Take a good look at the module in the fuel tank there is a float unit that in the sendor (with the fuel sending unit) that is designed to seal off the flow if the tank runs very low of fuel (this is to keep the system from getting air locked) and if it gets stuck, which they do, it will not allow fuel to be picked-up, you can add fuel it will not make a difference! Remove sendor module and free-ip float on bottom of unit, or remove,float and needle and seat Thanks Have a Merry Christmas!!
Have you checked to see if there is any codes stored in the computer? Yes you could have sensor issue, or a fuel solenoid issue (fuel cut solenoid, this is what shuts down the engine when you turn the key-off, It cuts off the fuel supply to the injection pump so the engine shuts off, If solenoid is bad, or voltage to the solenoid, then it wont start!