unfortunately there is no check valve on tiburon fuel rail and it needs some special adapter to check fuel rail pressureChanging a fuel pump is an expensive task. There should be a fuel pressure access point on the fuel rail and an inexpensive gauge can be used to monitor the fuel pressure when the engine is running. I would do this test before changing the pump. If you do have to change the pump, most people suggest using a quality [expensive] unit.
i don't want to change fuel pump assembly. just want to change electric motor inside. because i think everything include fuel filter, fuel pressure regulator and sending unit is ok. i just want to know what kind of fuel pump should i use?clearly how much fuel flow rate do i need for this v6 2.7 liter engine?