Pre-check the pressure in the fuel supply system (cm. «Checking fuel pressure in the power system»). If the system pressure is below 360 kPa (3.6 kgf/cm2), the fuel pump must be replaced, as its design is difficult to disassemble and the pump elements (the actual electric pump, filters and fuel pressure regulator) spare parts are not supplied.
You will need: a hardwood drift, a hammer, a container for draining fuel.
1. Remove the fuel tank (cm. «Replacing the fuel tank and its filler pipe»).
NOTE: Removing the fuel tank to replace the fuel pump is necessary because the Ford Focus II does not have a hatch in the base of the body above the fuel module, so it cannot be accessed with the tank installed on the vehicle.
2. Loosen the pressure ring securing the fuel pump module to the fuel tank by turning the ring counterclockwise with gentle
hammer blows through a wooden drift..
3.... and unscrew the ring from the fuel tank neck.
4. Carefully remove the fuel pump module, turning it so as not to damage or displace the float of the fuel gauge sensor, and drain the fuel from it into a previously prepared container.
5. Remove the O-ring and inspect it. Be sure to replace the ring if it is torn or severely compressed.
6. Install the fuel pump module in the reverse order of removal.
WARNING: The fuel pump module must be installed in a specific position, matching the marks made on the fuel tank (in the photo, the label is highlighted with white paint for clarity) and on the module body (In the photo, the label is highlighted in black paint for clarity), otherwise fuel lines cannot be connected to the module fittings.
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