How do people modify the EGR and why?
People remove the EGR system for two main reasons. Removing intake restrictions will reduce pumping losses and create more available power. Removing the EGR will also greatly reduce the amount of buildup that you will see on the intake manifold. It’s important to not seal off the crankcase ventilation hoses because the crankcase builds pressure that must be vented! Some people vent the hoses into a catchcan. Do not vent the hose onto the ground because you’ll have an oil slick under the car and on the road. This is like dumping used oil onto the road – this contaminates the ground/groundwater. There are a few ways to modify the operation of the EGR system. The first is to use the adaptation function of a Ross tech VCDS cable to adjust the degree of EGR system operation. The computer may react to the change in EGR flow and adjust timing. People report a mileage loss with this method of adaptation. It is possible to shut it off completely with a VCDS but this will set a check engine ligh
