GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Astro - 2WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Fuel Injector Replacement

Removal Procedure

    Object Number: 830261 Size: SH
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the upper intake manifold assembly. Refer to Upper Intake Manifold Replacement in Engine Mechanical-4.3L.
  3. Remove the fuel meter body assembly (1). Refer to Fuel Meter Body Assembly Replacement .
  4. Remove the injector assembly retainer (4) and the injector retainer lock nuts (2).

    5. Notice: Use care in removing the fuel injectors to prevent damage to the electrical connector terminals.

    The fuel injector is serviced as a complete assembly only.

    Also since the injectors are electrical components, these injectors should not be immersed in any type of liquid solvent or cleaner as damage may occur. Fuel injector cleaning is not recommended.

  5. While pulling the injector tube downward, push with a small tip punch down between the injector terminals until the injector (3) is removed.

Installation Procedure

    Object Number: 830261 Size: SH

    Important: Each injector is calibrated for a specific flow rate. Order the correct injector for the application being serviced when replacing the fuel injectors.

  1. Lubricate the O-ring seals with engine oil on the new fuel injector assembly (3).
  2. Install the fuel injector assembly (3) into the fuel meter body (1).

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the injector assembly retainer (4) and the injector retainer lock nuts (2).

    4. Tighten
    Tighten the injector retainer lock nuts to 3 N·m (27 lb in).

  4. Install the fuel meter body assembly. Refer to Fuel Meter Body Assembly Replacement .