Fuel Delivery and Air Induction: Service and Repair

Fuel System Cleaning

Special Tools

SA9127E-7 - Fuel Pressure/Flow Adapter

After it is determined that the fuel system is contaminated, the following procedure to clean it is recommended.

Warning

Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.

1. Place the vehicle on a hoist and open the hood.

Warning

Do not allow smoking or the use of open flames in the area where work on the fuel or EVAP system is taking place. Anytime work is being done on the fuel system, disconnect the negative battery cable, except for those tests where battery voltage is required.

Warning:
Refer to Battery Disconnect Warning Service Precautions.


2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.

3. Remove the fuel tank. Refer to Fuel Tank Replacement (AWD) Removal and ReplacementFuel Tank Replacement (FWD) Removal and Replacement.

4. Disconnect the fuel feed line at the fuel rail. Refer to Metal Collar Quick Connect Fitting Service Service and Repair.

5. With compressed air, blow out the fuel feed. Catch the fuel in a container at the opposite end of the line.

6. Remove the fuel tank modules. Refer to Fuel Tank Fuel Pump Module Replacement Fuel Tank Fuel Pump Module Replacement and/or Fuel Tank Fuel Pump Module Replacement - Secondary (With Out) Fuel Tank Fuel Pump Module Replacement - Secondary (Without).

7. Inspect the inlet filter on the primary pump. If plugged or damaged, the fuel pump module must be replaced.

8. Flush the tank with hot water for at least 6 minutes. Invert and drain. All metal chips/debris must be removed from the tank prior to installation.

9. Install the fuel pump modules to the fuel tank using a new fuel pump seal. Do not connect the fuel feed line to the new filter.

10. Install the fuel tank to the vehicle.

Caution:
Replace plastic fuel line retainers whenever the fuel supply or return line is disconnected at the fuel rail. Install the new retainer into the female cavity of the connection. Care must be taken to ensure that the locking tab is centered in the window of the female cavity. Firmly press the female connection onto the male end until a click is heard, then pull back to confirm engagement. Pinched, kinked, or damaged fuel lines must be replaced.

11. Connect the fuel line to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service Service and Repair.

12. Put at least 22.7 liters (6 gallons) of clean fuel into the fuel tank.

13. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.

14. Connect a scan tool to the vehicle and turn the ignition ON.

15. Raise the vehicle on a hoist and install the male quick connect adapter SA9127E-7 - fuel pressure/flow adapter into the fuel feed line.

16. Install the drain hose to the adapter and place the other end in an approved container.

17. Energize the fuel pump with the scan tool for 1-2 minutes. Refer to Energizing the Fuel Pump. This will pump about 1.9 liters (2 quarts) of fuel and purge any debris in the fuel pump.

18. Disconnect the fuel drain hose adapter at the fuel feed line and connect the fuel line to the fuel filter.

19. Energize the fuel pump and check all connections for leaks.

20. De-energize the pump, lower the vehicle, and start the engine.