Runs Few Sec Turns Off

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hi there this car is make in me crazy i did the bypass test put the jumper and put reley in made the humming noise put the car did nt start i dont no if i should change resistor anywhy i have a couple of questions
#1 how much fuel pump pressure should there be on a 97 gtp
2 my car has 70 000 on it can it be the pump
3 can it be the the ecm
4 can it be crank shaft sensor
plz reply back thank you
good place to buy fuel pump for this car and how much it should be live in ontario