Fuel System Cleaning Procedure

Remove or Disconnect:

NOTE: Have a dry chemical (Class B) fire extinguisher near the work area.

- Negative battery cable.
- Relieve fuel system pressure.
- Drain fuel tank. Refer to FUEL TANK DRAINING
- Fuel tank. Refer to FUEL TANK ASSEMBLY.
- Fuel gauge and pump unit. Refer to FUEL PUMP/SERVICE AND REPAIR/FUEL PUMP/FUEL GAUGE SENDING UNIT.

Inspect:
- Whenever the fuel tank is cleaned, the fuel pump strainer must be inspected. If strainer is contaminated, it must be replaced and the fuel pump must be inspected.
- Fuel pump inlet for dirt and debris. If found fuel pump should be replaced.

- Flush fuel tank with hot water.
- Pour water out of the fuel sender assembly opening (rock tank to be sure that removal of water from tank is complete).
- Remove in-line fuel filter.

Inspect:
- In-line fuel filter, for contamination.
- Replace the fuel filter, if it is plugged.

Clean:
- Fuel lines, by applying air pressure in the opposite direction of the fuel flow.

Install or Connect:
- In-line fuel filter.
- A new fuel strainer (if necessary) on the fuel sender and pump unit.

NOTE Care should be taken not to fold over or twist the strainer, when installing the sending unit, as this will restrict fuel flow.

- Fuel gauge sender and pump unit, with a new seal into the fuel tank.
- Fuel tank.
- Disconnect the fuel feed line at the front of the vehicle.
- Insert a hose to the fuel feed line at the front of the vehicle and insert the other end of the hose into a 3.8L (One gallon) fuel can.
- Reconnect the negative battery cable.
- Twenty-three liters (six gallons) of clean fuel into fuel tank.
- Energize the fuel pump relay, to operate the fuel pump, until two liters (one half gallons) of fuel flows into the fuel can. This will purge the fuel pump.
- Fuel line, at the front of the vehicle.

Check:
- Check all connections, for leaks, and tighten all hose clamps.