A fuel atomizing nozzle for use as a component part of a pressurized carburetor for an internal combustion engine in an automotive vehicle includes a housing forming part of the induction fluid passage through the carburetor, the housing having an inlet passage therein terminating at one end at an induction port, flow through which is controlled by a throttle-nozzle in the form of a poppet valve having a head and a stem, the stem being slidably received within a stepped valve guide bore in the housing, the guide bore having a stepped enlarged internal diameter adjacent to the induction passage to form, with the stem of the throttle-nozzle, a fuel discharge outlet, a fuel pressure regulator is associated with the housing to control fuel flow from a source of fuel under pressure to the fuel discharge outlet. An air-exhaust gas mixing valve has its outlet connected to the inlet passage in the housing, the mixing valve having an inlet for induction air and an exhaust inlet connectable to the exhaust system of the engine, a butterfly valve being positioned to control the flow of exhaust gases through the mixing valve, the butterfly valve being actuated by a linkage system operatively connected to the fuel pressure regulator whereby movement of the butterfly valve is controlled as a function of the fuel pressure in the fuel pressure regulator. The throttle-nozzle, in poppet valve form, functions as the primary throttle valve for the pressurized carburetor and is adapted to be operated by the usual throttle pedal control actuator by a vehicle operator.