Fuel Charging System

Pre-Service Procedures

The fuel charging system consists of:

• Throttle body (9E926).
• Upper and lower intake manifolds (9424) .

Prior to service or removal of the fuel charging assembly, the following Steps must be taken:

1. Open hood (16612) and install protective covers.

2. Disconnect battery ground cable (14301) and secure it out of the way.

3. Remove fuel tank filler cap (9030) and release fuel tank pressure.

4. Release pressure from fuel system. Refer to Section 10-01 for fuel system pressure relief procedures. A fuel pressure relief valve (9H321) on the fuel injection supply manifold (9F792) is provided for this procedure.

Post-Service Procedures

After the service is complete and the fuel charging system is installed onto the engine, the following steps must be taken:

1. Install fuel tank filler cap at fuel tank (9002) .

2. Connect battery ground cable .

3. Add engine coolant if required.

4. Turn ignition switch (11572) ON/OFF several times without starting engine to check for fuel leaks.

    CAUTION: The fuel system is normally pressurized to 276 kPa (40 psi).

   NOTE: Check all connections at fuel injection supply manifold , fuel injectors (9F593) , fuel line, push connect fittings, etc.

5. Start engine and warm to operating temperature. Check for engine coolant leak if coolant was removed.

6. Perform powertrain control module (PCM) Self-Test to check systems function. Refer to the Powertrain Control/Emissions Diagnosis Manual.