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Home >> Oldsmobile >> 1998 >> Aurora >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul 4.0L >> Fuel System >> Fuel Pump & Sending Unit >> Removal

Fuel Pump & Sending Unit: Removal

  1. Relieve the fuel system fuel pressure. Refer to FUEL PRESSURE RELIEF .
  2. Drain the fuel tank to at least 3/4 of a tank full. Drain the fuel through the fuel tank filler pipe by using a hand operated fuel pump device.
  3. Remove the spare tire cover, the jack, and the spare tire.
    CAUTION: Remove the rear compartment floor trim to provide technician contact with the vehicle's metal surfaces. Failure to remove the rear compartment floor trim may cause a static electricity discharge to ignite any fuel vapor resulting in personal injury and vehicle damage.
    NOTE: Remove the rear compartment floor trim to avoid damage from fuel spillage.
  4. Remove the rear compartment floor trim.
  5. Remove the bolts from the fuel sender access panel. See Fig 1.
  6. Remove the fuel sender access panel.
    NOTE: In order to prevent damage, cover the fuel pipe fittings with a shop towel before disconnecting the fuel pipes or removal of the fuel sender retaining ring, in order to catch any fuel that may leak out. Place the towel in an approved container when procedure is completed.
  7. Remove the quick-connect fittings at the fuel sender assembly.
  8. Remove the electrical connector at the fuel sender.
  9. Remove the electrical connector at the fuel tank pressure sensor.
    CAUTION: The modular fuel sender assembly will spring-up when the locking ring is removed.
  10. Remove the fuel sender retaining ring using the J 39765
    NOTE: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.
  11. Pull the modular fuel sender straight up while allowing fuel to drain from the reservoir. See Fig 2.
  12. Remove the fuel sender from the trunk.
  13. Place the fuel sender in an approved container.
  14. Clean the fuel sender assembly O-ring sealing surfaces.
  15. Inspect the fuel sender assembly O-ring sealing surfaces.
Fig 1: Identifying Access Panel
G00317792
Fig 2: Identifying Fuel Sender/Pump Assembly
G00317793