EGR Delay Timer System 6-Cylinder And V8 Models

Vehicles are equipped with EGR delay system which consists of an electrical timer which in turn is connected to an engine-mounted solenoid. The purpose of this delay device is to not allow EGR function for a preset amount of time following ignition turn on (this system is overridden by the CCEGR valve if cold engine start is made). Time delay is according to different applications, as shown in chart below.