Looking for some guidance. I recently purchased a 2013 LR4 with the5.0. Not supercharged. Recently experienced a rough idle situation almost to the point of engine shutdown. This was after about 30 mins of operation. Highway driving. OBD codes multiple cylinder misfire. Suspected EGR valve or idle air control valve problem. Can't find either on this engine. ??? Is there technology here taking the place of this function? HELP