Put the front end on ramps and jack the rear up and go under and trace back all the metal fuel lines and check to make sure you have no kinks.
If you do replace them, dealer parts.
If you have your fuel pump wired backwards it may still buzz.
So check your wiring job. You can either start at the fp and go forward.
Or the fuel rail and start back.
If all else fails......, Pull the codes.
Which. It sounds like your there.
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