My daughter's 2001 Nissan Altima will crank but not start. I have change the fuel pump, fuel pump relay, fuel pressure regulator, distributor rotor, spark plugs and spark plug wires, and battery. Sometimes the vehicle will crank for a few seconds, then cut off. I can leave it and come back in a few hours and it may do it again. Any help on what to try next is greatly appreciated.
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