Computer Controlled Catalytic Converter: Operation: Carburetors: Notes

Two feedback carburetors are used with the C-4 system, depending an application. The 1979 models use a Rochester Dualjet E2ME. All 1980 models use a Rochester Dualjet E2SE. These carburetors are designed with an electrically operated mixture control solenoid in the fuel bowl. This solenoid controls a metering rod which responds to impulses (dwell) from the ECM to make the carburetor mixture leaner or richer, as determined by oxygen sensor.