liquid fuel within the fuel tank 16 when the fuel tank 16 possesses liquid fuel a fuel pump within the fuel pump module 18 pumps fuel to the engine 12 through a fuel supply line 14 fig2 is a perspective view of a vehicle fuel supply system 19 depicting fuel injectors 22 more specifically in an erfs only a fuel supply line 14 carries fuel between the fuel pump module 18 and a common fuel injector rail 24 once the fuel reaches the injector rail 24 also called a u201c common rail u201d as depicted in fig2 the fuel passes into individual fuel injectors 22 before being sprayed or injected into individual combustion cylinders of the internal combustion engine 12 the fuel supply system 19 has no fuel return line from the common rail 24 to the fuel tank 16 fig3 is a perspective view of a vehicle fuel tank 16 depicting a mounting location 26 a hole for a fuel pump module 18 fig4 depicts one embodiment of a fuel pump module 18 that may be lowered through the hole 26 of the fuel tank 16 when installed while the fuel pump module 18 of fig4 depicts a generally horizontally elongated reservoir 27 the reservoir may be designed to be more vertically cylindrical as depicted in fig6 either of which is suitable for the teachings of the present invention continuing with the fuel pump module 18 of fig4 and 5 a.