Hey guys, Been having serious rough idle issues with my A3 and also a 'lack of boost' - starts to boost then stops then carries on a few seconds later. Anyways - after reading plenty of threads I decided to take off the EGR valve and give that a thorough clean - wouldn't believe how much soot came out!! I did the same with the throttle body while I was there and also the hose directly under the throttle body. When starting up it puffed out a lot of black smoke when revving hard - guessing this is a load of soot that's been dislodged? Upon taking her for a drive - the boost issue is still there (it may have improved SLIGHTLY - only saying 'may' as I could be just expecting it to have? if this makes sense. Also the rough idle has not improved one bit - it idles at about 820rpm - very juddery on idle - rev counter does not move at all. Any one got any ideas what this could be? Driving me mad..!