Fuel Pump Module

The electric fuel pump is located in and is part of the fuel pump module. See Figure . Fuel pump is a positive displacement, gerotor type, immersible pump with a permanent magnet electric motor. The fuel pump module is suspended in fuel in the fuel tank. The pump draws fuel through a strainer and pushes it through the motor to the outlet. The pump contains a check valve. The check valve in the pump outlet, maintains pump pressure during engine off conditions, for a short while. It is normal for fuel pressure to drop to zero after cool down. The check valve maintains volume of fuel in the rail and lines, not pressure. The fuel pump relay provides voltage to the fuel pump. The fuel pump has a maximum deadheaded pressure out put of approximately 130 psi (880 kPa). The regulator adjusts fuel system pressure to approximately 53-63 psi (365-434 kPa).