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Fuel System Cleaning

Fuel System Cleaning


Refer to Gasoline/Gasoline Vapors Warning .

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 both fuel tank pump modules. 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 both fuel tank pump module strainers. 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.

4.
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.


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 following quick connect fittings from the fuel rail:

• The feed hose/pipe

• The return 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 Injector Replacement .

8. Clean and inspect the fuel injectors and the fuel rail.


Installation Procedure

Assemble the fuel system as follows:


1. Install the fuel injectors and the fuel rail. Refer to Fuel Injector Replacement .

2. Install both fuel tank pump modules. Refer to Fuel Tank Fuel Pump Module Replacement .

3. Refer to Metal Collar Quick Connect Fitting Service in order to connect the following quick connect fittings to the fuel rail:

• The feed hose/pipe

• The return hose/pipe