I am working on an A6 with 185k miles on it with the 2.8 engine. It has a hesitation when going from a complete stop to basically any speed. Kind of like an old carb bog would have been. When you have it at road speeds (65-75 mph) it seems to have a skip, but no codes. I'm using a Determinator scanner from Matco, and having it use the Global option to pull codes. Anyone worked on one with this problem and fixed it?