Pre-Service Procedures
Pre-Service ProceduresThe fuel charging assembly consists of the throttle body, and the upper and lower intake manifolds. Prior to service or removal of the fuel charging assembly, the following steps must be taken:
1. Disconnect battery ground cable and secure it out of the way. Remove the fuel supply manifold shield.
2. Disconnect air cleaner outlet tube from throttle body.
3. Remove fuel tank filler cap to relieve tank pressure.
4. Relieve pressure from fuel system at fuel pressure relief valve (Schrader) on fuel injection supply manifold, as described in the following procedure.
Fuel Pressure Relief
WARNING: Fuel supply tubes 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.
1. Remove the protective cap from the fuel pressure relief valve.
2. Connect Multiport Fuel Injection (MFI) Fuel Pressure Gauge (EFI/CFI Fuel Pressure Gauge) T80L-9974-B to the fuel pressure relief valve on the fuel injection supply manifold.
3. Place end of the adapter hose in a suitable container.
4. Open the manual valve on the Multiport Fuel Injection (MFI) Fuel Pressure Gauge (EFI/CFI Fuel Pressure Gauge) T80L-9974-B to relieve fuel system pressure.
5. Close the manual valve and disconnect the tool from the fuel pressure relief valve. Remove container.
6. Install the protective cap on the fuel pressure relief valve.