Fuel System Cleaning: Notes

The following procedure covers the disassembly and the inspection of the complete fuel supply system. If the fuel system is contaminated, the fuel system can be cleaned. You can usually determine the extent of the fuel system contamination during the disassembly.

1. Remove the fuel tank pump module. Refer to Fuel Tank Fuel Pump Module Replacement .
2. Locate the tank in a suitable work area away from any heat, any flame, or any other source of ignition.
3. Perform the following procedures:
   • Inspect the fuel tank pump module strainer. Replace the fuel tank pump module if the strainer is contaminated.
     WARNING:

     Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury.

     NOTE:

     Only use oil-free compressed air to blow out the fuel pipes.

   • Use compressed air in order to apply air pressure to the transfer tube.
NOTE:

When flushing the fuel tank, handle the fuel and water mixture as a hazardous material. Handle the fuel and water in accordance with all applicable local, state, and federal laws and regulations.

4. Flush the fuel tank with running hot water for at least five minutes. Pour the water out of the fuel pump module opening. Rock the fuel tank in order to ensure that the removal of the water from the fuel tank is complete.
5. Refer to Metal Collar Quick Connect Fitting Service  in order to disconnect the fuel feed hose/pipe.
6. Use compressed air in order to apply air pressure to the fuel lines in the opposite direction from the normal fuel flow.
7. Remove the fuel rail and the fuel injectors. Refer to Fuel Injection Fuel Rail Assembly Replacement .
8. Clean and inspect the fuel injectors and the fuel rail.