Nissan Altima Forum banner

plenum

  1. 3rd Generation Altima (2002-2006)
    My 2003 Altima with 61,000 miles had an intermittent rough idle and an occasional sulphur ("eggy") smell. It was diagnosed with code P0301 (Misfire, Cylinder 1). The shop kept the car 2 days. During this time they removed the upper plenum where they found it was clogged with carbon and the...
Top