Feedback Carburetor

A specially calibrated carburetor is used to keep air/fuel ratios within narrow limits for best emission control. The carburetors used on 4 and 8 cylinder engines have an electronic solenoid valve, controlled by the computer, which is capable of adjusting the main mixture circuits.

Carburetors used on the 6 cylinder engines are controlled by a vacuum signal. The combustion computer electrically operates a solenoid regulator, which sends a vacuum signal to the carburetor. Two diaphragms in the carburetor are moved by the vacuum signal and adjust idle and mixture ratios.