a fuel cell system with an ejector is provided . in particular , the system includes a stack , fuel injection nozzle and a water injection nozzle . in particular , the stack produces electricity via an electrochemical reaction using fuel and air . the fuel injection nozzle injects fuel into the stack and the water injection nozzle injects water into the fuel injection nozzle . in particular , water is supplied from the water injection nozzle into the fuel injection nozzle due to a vacuum within the fuel injection nozzle .