Hi guys Hoping you can help me out a bit with this as done a lot of research online and found LOTS of people having the exact same/very similar issues with their 2.0 TDI engines across the Audi range. Mine is the A6 2.0 TDI 2008. However, in all the research I did nobody was providing a single solution. So hoping someone may recognise my symtoms... When all warmed up seems very happy indeed. However, from a cold start the revs can be a little juddery. You can feel a light shaking to the car. When you increase the revs it seems to 'stutter'. I have taken a video. You may be able to make out the light shaking/juddering. Watch as revs increase: This is accompanied by excessive smoke, which I would say is white. Check it out: Any ideas very welcome!