Hi all, as per title, my S4's still idling rough. I had her put on a diagnostics machine week, which came up with an airbag fault (getting done next week) and a lambda sensor fault. I've have the lambda sensor changed and it has improved alot, but its still rough. Mainly when its settled down to around 8-900 revs. I changed the plugs yesterday to ngk platinum laser ones, and again it feels a little better but still not perfect. Im assuming its an air/vacuum leak i.e maf sensor, but any help is much appreciated.