Fuel Pressure Pulsation Damper: Description and Operation

FUEL RAIL PULSE DAMPER

Typical Fuel Rail Pulse Damper:

The fuel rail pulse damper is located on the fuel rail and reduces the fuel system noise caused by the pulsing of the fuel injectors. The vacuum port located on the damper is connected to manifold vacuum to avoid fuel spillage if the pulse damper diaphragm ruptures. The fuel rail pulse damper should not be confused with a fuel pressure regulator; it does not regulate the fuel rail pressure.