EGR System - Gasoline: Description
The Exhaust Gas Recirculation (EGR) system recirculates exhaust gases into the combustion chamber to reduce combustion temperatures. The reduction in temperature acts to reduce oxides of nitrogen (NOx) emissions. On all models except Maxima, 300ZX and 300ZX Turbo, the system consists of an EGR control valve, thermal vacuum valve (TVV) (except on Fed. Pulsar and Sentra), backpressure transducer valve (BPTV) (except on Calif. Pulsar and Sentra), and various connecting hoses and tubes.
On Maxima, 300ZX and 300ZX Turbo, the EGR system is controlled by the ECCS control unit. The system consists of EGR Control Valve, EGR Control Solenoid Valve, Throttle Valve Switch, Cylinder Head Temperature Switch and Crank Angle Switch.