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Did you use the old fuel pump or was there one in the used fuel tank? If you did use the old fuel pump check your fuses and relays. If the used tank had a fuel pump already in it then the fuel pump may be bad.
fuel injected cars cannot vapor lock, so not the issue, when they replaced the fuel tank did they replace fuel pump? It should have been, but 2 things come to mind, they pinched wires when putting tank in and it shorts sporadically shutting off pump, look around with light and trace wires looking for any breaks in plastic coating, or fuel pump is failing.
If you hit the tank and it ran? The fuel pump is bad. By striking the tank you jarred the pump, causing what mechanics call "The last ride" Peice of sound advise, Replace with ac delco pump. The zone pumps go out usaly within months if not days
if its petrol engine bang bottom of fuel tank while some one else cranks vehicle over if it starts good just pump jammed if it dont buzz to life and you cant hear fuel pump buzzing ceck for power to it if thats there replace pump. running out of fuel kills electric fuel pumps internally in petrol tanks.
if its diesel you must bleed fuel system taking extreme care if you un do lines some very high pressure
fuel pump could be overheating and need replaced, if this happens exactly the same each time it seems that is the case, the gasoline in the tank cools the pump through the returned system, alot of people that drive around near empty all the time will burn out their fuel tank quicker because of the pump not being cooled properly, you have spark when the car wont start?