RAM 3500 HD Truck 4WD L6-6.7L DSL Turbo (2008)
Fuel Inlet Metering Valve: Description and Operation
Fuel Control Actuator
Description
DESCRIPTION
The Fuel Control Actuator (FCA) (3) is located at the rear of the high-pressure, fuel injection pump.
Operation
OPERATION
The Fuel Control Actuator (FCA) is an electronically controlled solenoid valve. The ECM controls the amount of fuel that enters the high-pressure
pumping chambers by opening and closing the FCA based on a demanded fuel pressure. When the FCA is opened, the maximum amount of fuel is being
supplied to the fuel injection pump. Any fuel that does not enter the injection pump is directed to the cascade overflow valve. The cascade overflow
valve regulates how much excess fuel is used for lubrication of the pump and how much is returned to the fuel tank through the drain manifold.
An audible click from the FCA is normal when operating the key from the ON to the OFF position.
