Fuel Rail: Description and Operation
FUEL RAILDESCRIPTION
The Fuel Rail is used to mount the Fuel Injectors to the engine and is itself mounted to the Intake Manifold. The Fuel Rail supplies the necessary fuel to each individual Fuel Injector and is located above the Intake Manifold and Fuel Injectors. The Fuel Rail is also equipped with a service port. The service port is used to connect a mechanical fuel pressure gauge to perform pressure tests.
OPERATION
The Fuel Rail is designed to function in a semi-returnless Fuel System. The Fuel Pressure Regulator is no longer mounted to the fuel rail. The Fuel Pressure Regulator is now located on the Fuel Pump. The fuel rail is not repairable, and must be replaced if it is damaged or malfunctioning.