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.