This fuel injector delivers a metered charge of pressurized fuel into the engine cylinder at the precise moment required for combustion. It is a component of the high-pressure fuel system, receiving fuel from the injection pump and atomizing it into the combustion chamber. A failing injector typically causes misfiring, rough idle, reduced power output, and increased fuel consumption. As an original-manufacturer component, it is machined to the specific flow-rate and opening-pressure tolerances that the engine management system expects, ensuring consistent injection timing across all cylinders. On installation, ensure the sealing washer is replaced and the injector hold-down clamp is torqued to specification to prevent combustion gas leakage.