EGR information
The EGR system reduces emissions by directing a small quantity of exhaust gases backinto the intake manifold to dilute the air/fuel mixture efectively. An EGR cooler reduces the exhaust gas temperature by as much as 50ºC. This reduces the amount of oxides of nitrogen (NOx). The funcion of the EGR is managed by the ECU via the EGR vacuum regulator solenoid valve. The remove of the EGR valve also removes the Intake manifold change-over valve. This is a flap valve that closes for aproximately 3 seconds when the engine stops, blocking the air to the engine. This reduces the suddenness of the diesel engine shut-down. The valve re-opens when once the engine has stopped.
