Hooking up a fuel pressure gauge an seeing if the fuel pump is in fact charging the fuel system . Checking the electrical circuit , fuel pump relay , Instead of guessing as to what the problem is , Test ,Test an test . If you do not know how to do automotive electrical testing there are videos on youtube .
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts When you turn the key on ,not start , the engine computer will energize the fuel pump for a few seconds to prime the system . The fuel pump will not be turned on again if the engine computer does not see a signal from the crankshaft position sensor . Instead of being fixated on the fuel , check for spark . Also find a wiring diagram at
http://www.bbbind.com/free_tsb.html Do you know what a wiring diagram is , how to read one ?
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Repairing automobiles the correct way involves years of training , an testing .
Fuel Pressure Test