The fuel rail consists of four parts:
The fuel rail is mounted on the intake manifold and distributes fuel to each cylinder through the individual injectors.
Fuel is delivered from the pump through the fuel feed line to the inlet port of the fuel rail pipe. From the fuel feed inlet, fuel is directed to the rail pipe to the fuel pressure regulator. Fuel in excess of injector needs flows back through the pressure regulator assembly to the outlet port of the fuel rail. Fuel then flows through the fuel return line to the fuel tank to begin the cycle again.
REMOVAL & INSTALLATION
When servicing the fuel rail assembly, precautions must be taken to prevent dirt and other contaminants from entering the fuel passages. It is recommended that fittings are capped and holes plugged during servicing.
- Bleed the fuel pressure from the fuel system.
- Clean the fuel rail assembly and connections. Use a spray type cleaner. Never immerse the fuel rail or components in a liquid solvent.
- Remove the fuel feed and return pipes from the fuel rail.
- Remove the vacuum line from the pressure regulator.
- Detach the injector electrical connectors.
- Remove the fuel rail hold-down bolts.
- Pull on the fuel rail with equal force on both sides of the rail to remove it.
- O-rings must be replaced on all components that are replaced.
- Lightly oil the injector O-rings with clean motor oil.
- Place the rail assembly on the manifold and seat the injectors by hand.
- Tighten the fuel rail hold down bolts to 22 ft. lb. (30 Nm)
- Install the fuel feed and returns by pushing the pipes onto the fuel rail tubes.
- Reattach the fuel injector electrical connectors, and plug in the vacuum line to the pressure regulator.