Fuel Charging System

Pre-Service Procedures

Fuel Pressure Gauge:

SPECIAL SERVICE TO0L(S) REQUIRED


WARNING: FUEL SUPPLY LINES WILL REMAIN PRESSURIZED FOR LONG PERIODS OF TIME AFTER ENGINE SHUTDOWN. THIS PRESSURE MUST BE RELIEVED BEFORE SERVICING OF THE FUEL SYSTEM IS BEGUN. A VALVE IS PROVIDED ON THE FUEL INJECTION SUPPLY MANIFOLD FOR THIS PURPOSE.

The fuel charging system consists of the throttle body, and the intake manifold, fuel injectors, fuel pressure regulator and Idle Air Control Valve (IAC Valve). Prior to service or removal of the fuel charging system perform the following steps:

1. Disconnect battery ground cable.
2. Remove fuel tank filler cap and release fuel tank pressure.

Fuel Pressure Relief
1. Remove engine Air Cleaner (ACL).
2. Connect Multiport Fuel Injection (MFI) Fuel Pressure Gauge (EFI/CFI) 310-012 (T80L-9974-B) to the fuel pressure relief valve on the fuel injection supply manifold.
3. Open the manual valve on the gauge to relieve fuel system pressure.

Post-Service Procedures
After the service is complete and the fuel charging system is installed onto engine, perform the following steps:
1. Install fuel tank filler cap at fuel tank.
2. Connect battery ground cable.
3. Add engine coolant (if required).
4. Turn ignition switch ON/OFF several times without starting engine and check for fuel leaks.

WARNING: THE FUEL SYSTEM IS NORMALLY PRESSURIZED TO 276 KPA (40 PSI). USE CARE WHEN SERVICING THE FUEL SYSTEM OR PERSONAL INJURY MAY OCCUR.

NOTE: Check all connections at fuel injection supply manifold, fuel injectors, 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 on-board diagnostic to check system function.