For 1990-2009 cars

### Removal Procedure

1. Disconnect the negative battery cable.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

2. Remove the intake plenum. Refer to Intake Plenum Replacement .
3. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
4. Remove the fuel supply hose from the fuel rail.
5. Remove the fuel return hose from the fuel rail.
6. Remove the fuel injector electrical harness connector.
7. Remove the intake manifold bolts.

Important: Mask off the ports to the intake manifold spacer. Severe damage may result if foreign objects enter the engine.

8. Remove the intake manifold.

Important: Do not damage the machined aluminum surfaces or improper sealing may occur.

9. Clean the intake manifold sealing surfaces with a nonabrasive tool or solvent.

### Installation Procedure

1. Remove the masking from the intake ports.
2. Install the intake manifold.

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 intake manifold bolts.

Tighten
Tighten the intake manifold bolts to 20 N·m (15 lb ft).

4. Install the fuel injector electrical harness connector.

Important: Counterhold the connections to prevent damage to the fuel rail.

5. Install the fuel supply hose.

Tighten
Tighten the fuel supply hose connections to 15 N·m (11 lb ft).

Important: Counterhold the connections to prevent damage to the fuel rail.

6. Install the fuel return hose.

Tighten
Tighten the fuel return hose connections to 15 N·m (11 lb ft).

7. Install the intake plenum. Refer to Intake Plenum Replacement .
8. Reconnect the negative battery cable.
9. Reprogram the applicable accessories.