Fuel Pump Filter Replacement

When diagnosing conditions affecting the vehicle's fuel system, a common item of replacement is the electric fuel pump located inside the fuel tank. On many of these fuel pumps, simply replacing a clogged fuel filter will bring them back to normal operation. Since the filter is attached to the bottom of the fuel pump, it is easily clogged if contaminated fuel is added to the tank.





Most Mitsubishi Motors' vehicles have either a "sock" type or a "cage" type fuel filter. Refer to the illustration.

IMPORTANT NOTICE:
All warranty returned electric fuel pumps are tested for normal operation. If the only problem on returned fuel pumps is a clogged fuel filter, the warranty claim will be denied.

WARNING:
Observe all Service Manual precautions, warnings, and instructions while servicing the fuel system.

NOTE:
Each vehicle's fuel pump is slightly different, but fuel pump filter replacement procedures are similar for all models.





1. Remove the fuel pump from the fuel tank. Since this step requires releasing pressure in the fuel lines, draining the fuel tank, and possibly removing the tank from the vehicle, refer to the appropriate vehicles' Service Manual for instructions.

2. With the fuel pump on a work bench, carefully dislodge the fuel pump motor from the pump bracket. On some fuel pumps, it is necessary to remove the lower bracket clamp to dislodge the pump motor.





3. Remove the rubber fuel pump vibration dampener to expose the fuel filter retaining clip (or nut). Remove the retaining clip (or nut) and the filter.

4. Install the new fuel filter onto the fuel pump. If specified in the Service Manual, tighten the fuel filter retaining nut to the proper torque.

5. Before installing the fuel pump into the tank, observe the condition of the old fuel filter. If the filter was severely clogged, clean the inside of the fuel tank thoroughly.

6. Using a new gasket, install the fuel pump into the fuel tank. Re-assemble all other components.

7. After installing the fuel pump, run the engine to verify normal operation.

PARTS INFORMATION

For most vehicles, the fuel pump gasket and filter are available from your facing PDC on a stock or daily order. Refer to the latest parts microfiche for correct part numbers.

WARRANTY INFORMATION

For fuel pump filter replacement:
(Fuel pump filter replacement is a 12/12 coverage item.)

Position Code: 136011
Labor Operation Code: 13601110
Nature Code: 05D
Cause Code 570

Use normal warranty procedures.