Electric Fuel Pump

REMOVAL & INSTALLATION

323, Protege, 1990–92 626 and MX-6 and 1992–94 MX-3 Models

1. Relieve the fuel pressure and disconnect the negative battery cable.
2. If not already removed, depress the clips on each end of the rear seat cushion and remove the cushion.

   Fig. 1: Detach the fuel hoses and electrical connections from the fuel pump, then remove the attaching screws and the pump

   Fig. 2: Exploded view of the fuel pump assembly for the 323, Protege, 1990–92 626, MX-6 and 1992–94 MX-3

3. If not already done, detach the electrical connector from the fuel pump/sending unit.
4. Remove the attaching screws from the fuel pump/sending unit access cover and remove the cover.
5. Disconnect the fuel supply and return hoses from the fuel pump/sending unit.
6. Remove the attaching screws and the fuel pump/sending unit from the fuel tank.
7. Detach the sending unit electrical connector, remove the sending unit attaching nuts and remove the sending unit from the fuel pump assembly.

   To install:

8. Attach the sending unit to the fuel pump assembly and install the nuts. attach the sending unit electrical connector.
9. Install the fuel pump/sending unit into the fuel tank with a new gasket and install the mounting screws.
10. Connect the fuel supply and return lines.
11. Install the access cover and the mounting screws.
12. Attach the sending unit electrical connector.
13. Position the rear seat cushion over the floor, making sure to align the retaining pins with the clips. Push down firmly until the two retaining pins are locked into the rear seat retaining clips.
14. Connect the negative battery cable, start the engine and check for proper system operation and for fuel leaks.

1995 MX3 Models

CAUTION
Do not allow fuel spray or vapors to come in contact with a spark or an open flame. Keep a dry chemical fire extinguisher nearby. Never store fuel in an open container due to risk of fire or explosion.

1. Relieve the fuel system pressure.
2. Disconnect the negative battery cable.
3. Remove the rear seat cushion from the vehicle.
4. Remove any dirt that has accumulated around the fuel pump cover so it will not enter the tank during pump removal and installation.
5. Remove the fuel pump cover.
6. Detach the fuel gauge connector, hoses, and the gauge.
7. Unplug the fuel pump electrical connector.
8. Remove the fuel pump from the bracket assembly. Remove and discard the seal ring.

   To install:

9. Clean the fuel pump mounting flange, fuel tank mounting surface and seal ring groove.
10. Apply a light coating of grease on a new seal ring to hold it in place during assembly and install in the seal ring groove.
11. Install the fuel pump to the bracket assembly carefully to ensure the filter is not damaged. Make sure the seal ring remains in the groove.
12. Hold the pump assembly in place, and pull the fuel pump down so that it is tight against the bracket.
13. Attach the fuel pump electrical connector.
14. Install the fuel gauge, hoses, and gauge connector.
15. Install the fuel pump cover.
16. Install the rear seat cushion.
17. Connect the negative battery cable, start the engine and check for proper system operation and for fuel leaks.

Millenia and 1993–98 626/MX-6/Probe Models

1. Relieve the fuel system pressure and disconnect the negative battery cable.
2. Drain and remove the fuel tank.

   Fig. 3: Exploded view of the 1993–98 626/MX-6/Probe fuel pump assembly

3. Disconnect all fuel hoses from the fuel pump unit.
4. Turn the fuel pump ring counterclockwise and remove it.
5. Remove the fuel pump and gaskets from the fuel tank.

   Fig. 4:A special tool is usually available to remove or install the fuel pump locking cam

   Fig. 5:A brass drift and a hammer can be used to loosen the fuel pump locking cam

   Fig. 6:Once the locking cam is released it can be removed to free the fuel pump

   To install:

6. Install the fuel pump with a new gasket. Turn the fuel pump ring clockwise to tighten it until the flange hits the stopper.
7. Connect the fuel hoses to the fuel pump.
8. Install the fuel tank, add a minimum of 10 gallons and check for leaks.
9. Lower the vehicle and connect the negative battery cable.