So still trying to get to the bottom of this stuttering on acceleration, so changed the above over with the one on the other A4 same engine ect, and noticed the problematic car had a vacuum on one of the pipes when I released them, however on the good running car there was no air wush as I released the pipes, could this indicate an issue?
When I finally get some time off I will send it in to be scanned just working 12hr shifts I can't get to a garage at present.