Controlled Deceleration Device: Description

The Boost Controlled Deceleration Device (BCDD) is installed to reduce hydrocarbon (HC) emissions during deceleration. On 1979 models, the BCDD is mounted on carburetor (under throttle chamber on 280ZX and 810). The device supplies additional air/fuel mixture (additional air on 280ZX and 810) to the intake manifold to maintain the proper air/fuel ratio for complete combustion of fuel during periods of vehicle deceleration. System components include: boost controlled deceleration device, vacuum solenoid valve, speed detecting switch (manual transmission), amplifier and inhibitor switch (automatic transmission).