Carburetor: Description and Operation

Fig. 1 Front view of carburetor:

Fig. 2 Top view of carburetor:

The feedback carburetor, Figs. 1 and 2, is used on all 1985-88 carbureted models.
The fuel/air mixture is controlled by an electronic feedback type carburetor. Carburetor operation is controlled by an electronic carburetor control unit (computer). The computer monitors engine and vehicle operating conditions through a series of sensors, determines ideal fuel/air mixtures, then controls carburetor operation by energizing fuel and air control solenoids and relays.
Refer to the "Feedback Carburetor" under "Computerized Engine Controls" for description, troubleshooting and servicing of this system.
There are eight basic systems in the feedback carburetor: fuel inlet, primary metering, secondary metering, accelerator pump, choke, jet mixture, enrichment and fuel cut-off. The first five systems are similar in design and operation to conventional two barrel downdraft carburetors, the remaining systems are primarily incorporated in the feedback system.