Fuel Rail Assembly

The fuel rail assembly (3) attaches to the cylinder head. The fuel rail assembly distributes pressurized fuel to the fuel injectors through the fuel lines.

The fuel rail assembly consists of the following components:

• The fuel rail pressure sensor (4)
• The fuel pressure regulator (6)

The fuel rail pressure sensor gives the engine control module (ECM) an indication of fuel pressure. The ECM uses this information to regulate fuel pressure, by commanding the fuel pressure regulator open or closed on the inlet of the fuel injection pump.