GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Eldorado 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Intake Manifold Assemble

    Object Number: 205428 Size: SH

    Important: The following steps are only necessary if the throttle body or intake manifold required replacement.

  1. Align the snap lock retainers and fuel injectors in position on the intake manifold.

    2. Object Number: 205463 Size: SH
  2. Snap the entire fuel rail and injector assembly into the intake manifold by pressing the fuel rail and injector simultaneously into correct position. DO NOT force the injector into position or damage to the o-ring seals could occur. Keep the fuel rail ground wire (1) clear of the injectors.

    3. Object Number: 211456 Size: SH
  3. Connect the fuel regulator vacuum tube.

    4. Object Number: 315073 Size: SH
  4. Place the fuel injector wire harness in position and connect each connector to its respective fuel injector.

    5. Object Number: 331876 Size: SH
  5. Install the power brake booster vacuum hose.

    6. Object Number: 205474 Size: SH

    Important: Make sure all mating surfaces for the throttle body spacer and throttle body are clean. Any debris or flawed sealing surfaces could cause vacuum leaks and hinder engine performance.

  6. Install the throttle body spacer retaining bolts (2) and throttle body spacer (1) to the intake manifold.

    7. 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.

    Tighten
    Tighten the throttle body spacer bolts to 12 N·m (106 lb in).


    Object Number: 350281 Size: SH
  7. Press the MAP sensor in position at the top of the spacer mounting location.

    8. Object Number: 205480 Size: SH
  8. Install a new throttle body gasket (1) on the throttle body (3). Make sure all the old gasket material is removed.

    9. Object Number: 205484 Size: SH
  9. Place the throttle body (4) in position on the throttle body spacer (1).
  10. Install the upper (2) and lower (3) throttle body retaining bolts.

    11. Tighten
    Tighten the upper throttle body retaining bolts to 12 N·m (106 lb in).

    Tighten
    Tighten the lower throttle body retaining bolts to 10 N·m (89 lb in)