Description & Operation

Toyota carburetor models use a Feedback Control (FBC) System. By means of a signal from Oxygen (O2) sensor, carburetor primary side main air bleed and slow air bleed volume are controlled to maintain optimum air-fuel mixture. This reduces HC, CO, and NOx in addition to providing better driveability and fuel economy.

All models use an Electronic Air Bleed Control Valve (EBCV) and ls also incorporate an Electronic Air Control Valve (EACV). Two vacuum switches are used. See Figure.