Like many others of his generation, John Mack's first work experience was a turn on the plow. His German parents owned and operated a farm near Scranton, Pennsylvania, where John and his four brothers ...

Internal EGR means there's no new external plumbing on this '03-model Maxidyne. The system is simpler than cooled EGR used on other engines, but perfecting the valve action to make it work was not ...