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Home >> Saturn >> 2005 >> L300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction >> Repair Instructions >> Fuel System Cleaning >> Cleaning Procedure
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Cleaning Procedure

    Fig 1: Identifying Proper Lift Points
    GM872284Courtesy of GENERAL MOTORS CORP.
    CAUTION: 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.
    2. CAUTION: 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.
  2. Disconnect the negative battery cable.
    3. Fig 2: Removing/Installing Front Fuel Feed & Return Lines At Fuel Rail
    GM892760Courtesy of GENERAL MOTORS CORP.
  3. Drain the fuel tank. Refer to Fuel Tank Draining Procedure .
  4. Remove the fuel tank. Refer to Fuel Tank Replacement .
  5. Disconnect the fuel feed and return line at the fuel rail.
  6. With compressed air, blow out the fuel feed and return lines. Catch the fuel in a container at the opposite end of the line.
  7. Remove the EVAP canister from the fuel tank. Refer to Evaporative Emission (EVAP) Canister Replacement .
    8. Fig 3: Removing/Installing Fuel Pump Module
    GM892958Courtesy of GENERAL MOTORS CORP.
  8. Remove the pump module. Refer to Fuel Sender Assembly Replacement .
  9. Inspect the inlet filter on the pump. If plugged or damaged, the fuel pump module must be replaced, not serviced separately.
  10. 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.
  11. Install the EVAP canister to the fuel tank.
  12. Install the fuel pump module to the fuel tank using a new fuel pump seal. Do not connect the fuel feed line to the new filter.
  13. Install the fuel tank to the vehicle.
    14. NOTE: 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.
  14. Connect the fuel lines to the fuel rail.
  15. Put at least 22.7 liters (6 gallons) of clean fuel into the fuel tank.
  16. Connect the negative battery cable.
  17. Connect a scan tool to the vehicle and turn the ignition ON.
    18. Fig 4: Installing Quick Connect Fitting & Drain Hose To Fuel Feed Line
    GM871797Courtesy of GENERAL MOTORS CORP.
  18. Raise the vehicle on a hoist and install the male quick connect adapter, from the SA9127E  into the fuel feed line.
  19. Install the drain hose to the adapter and place the other end in an approved container.
  20. 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.
  21. Disconnect the fuel drain hose adapter at the fuel feed line and connect the fuel line to the fuel filter.
  22. Energize the fuel pump and inspect all connections for leaks.
  23. De-energize the pump, lower the vehicle, and start the engine.
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