Electronically Controlled Carburetor: Description

Subaru models are equipped with an electronically controlled carburetor that improves driveability while reducing emissions. An oxygen sensor in the exhaust measures the air/fuel ratio, then an electronic control unit adjusts the carburetor with air bleeds controlled by duty solenoids. The system components include: control unit, oxygen sensor, 2 duty solenoids, 2 vacuum switches, a thermal switch, an air cleaner for the duty solenoids and a special carburetor.