GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1996 🢒 Aurora 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 Fuel Injector Replacement

Removal Procedure

Tools Required
    •  J 34730 , Fuel Pressure Gauge
    • J 41081

    Object Number: 18881 Size: SH
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
  2. Remove the fuel injector electrical connector.

    3. Object Number: 18873 Size: SH
  3. Release the fuel rail to intake manifold locking tab (8) by pushing toward center of intake manifold.

    4. Object Number: 18886 Size: SH
  4. Pry the fuel injector up out of intake manifold using J 41081 between the bottom of injector and intake manifold.

    5. Object Number: 18873 Size: SH
  5. Spread the fuel injector retainer clip (3) to release fuel injector from fuel rail.

    6. Object Number: 12639 Size: SH

    Notice: It may be necessary to release the adjacent injector(s) from the intake manifold to allow increased fuel rail movement for injector access.

    Important: When replacing a fuel injector, it may be necessary to have the following identification information. The fuel injector assembly contains the part number identification (2), the build date code (3), the month (4) 1-9 (Jan-Sept) O, N, D (Oct, Nov, Dec), the day (5), and the year (6).

  6. Remove the fuel injector assembly (1).

Installation Procedure

    Object Number: 18873 Size: SH
  1. Lubricate the new upper (6) and lower injector (4) O-rings with clean engine oil and install on fuel injector (5).
  2. Install the new retainer clip (3) onto the fuel injector.
  3. Install the fuel injector into fuel rail.
  4. Push the fuel injector in far enough to engage retainer clip with machined slots on rail socket.

    5. Object Number: 18881 Size: SH
  5. Push the fuel rail down onto the intake manifold until the locks latch.
  6. Install the fuel injector electrical connector on the fuel injector.

    7. Object Number: 13586 Size: SH
  7. Tighten the fuel filler cap.
  8. Install the negative battery cable. Refer to Battery.
  9. Inspect for fuel leaks.
    10. 9.1. Turn ignition switch to On position for 2 seconds.
    9.2. Turn the ignition switch OFF for 10 seconds.
    9.3. Turn the ignition switch ON.
    9.4. Check for fuel leaks.

    Object Number: 42751 Size: SH
  10. Install the rear seat cushion. Refer to Seats and Carpet.
  11. Install the intake manifold top cover.

    12. Tighten
    Tighten the intake manifold top cover to 2 N·m (18 in lb).