heres one for ya Jim.
EGR deletion
EGR deletion in the Diesel is considered justified by a wide range of people, including the environmentally conscious. Although deleting the EGR system results in increased Nitric oxide. Hydrocarbon, Particulate, Carbon monoxide and Carbon dioxide are drastically reduced. Further adding to benefits of EGR deletion, is the increase in fuel economy which can be over 25%. Reduced fuel consumption has environmental benefits that extend beyond the vehicle itself. End gas recirculated back into the cylinder adds wear inducing contaminants and increase engine oil acidity. This can result in a poorly, inefficient running engine. The increased level of soot also has negative effects on Diesel particulate filters. This increase in soot creates a whole subset of problems and scenarios that can negatively impact the immediate environment.
Source: http://en.wikipedia.org/wiki/EGR
