Get under fuel tank, have friend turn on ignition. Buzz or Whine? No? Get new fuel pump./regulator.
BTW, shotgunning parts is ignorant, especially when you can get codes read free at Auto Zone. This is like buying a string of old, used cars, and hoping one doesn't give trouble.I knew a Nut case that Did this--wasted $$ , expected Me to i fix them with my Bare Hands. He could have saved that $ and bought One, Good car. My parents were raised in the Depression., I was taught not to waste things.