Well first thanks to this forum was able to get the vehicle history, and apparantly may 2010 it was in the shop for misfires to the 1 3 5 cylinders...( i went to the dealer and read the notes ) Well the notes from the tech said check injectors...they were fine...replaced 1 3 5 spark plugs...then last line said something about small leak...but didnt get to read it all when the service manager closed the file...Well We are getting misfire codes again and have an appointment. Any TSBs I can bring in or should I just ask them to review file from earlier in the year and rediagnose problem?