Ecotronic system (carburetor) function of: choke valve regulator, solenoid valves, potentiometer, corrector needle, throttle valve regulator, float, float needle valve, throttle valve and idle-mixture adjusting screw description ordernumber 1033 see also: single-vane vacuum pump mixture control unit of KE-Jetronic MAN direct injection with bowl-in piston in-line pump with RSF flyweight governor