Carburetor - ROCHESTER E4MC/E4ME: Identification
The Rochester E4MC and E4ME carburetor numbers are stamped vertically on the float bowl, near secondary throttle. If float bowl is replaced, follow manufacturer's instructions contained in service package to transfer part number to new float bowl. Some models have machined pump wells to reduce the pump well taper.
The E4MC and E4ME Quadrajet carburetors are used with the Computer Command Control (CCC) system. The first letter "E" indicates the carburetor is a part of the CCC system. The final letter, if "E", indicates the carburetor is equipped with an electric choke; if "C", a hot air choke.