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Deceleration Control System: Description

The Deceleration Control system is designed to maintain a balanced air/fuel mixture during deceleration. Upon initial deceleration, rapid closing of throttle plates can cause overly rich fuel mixture. This system consists of an anti-afterburn valve (air by-pass valve on 626 and Calif. B2000 models) and throttle positioner system. The throttle positioner system consists of servo diaphragm, engine speed switch and 3-way solenoid valve.

Fig 1: Mazda Throttle Positioner System
G09313944Courtesy of MAZDA MOTORS CORP.