Is this an all the time problem, or only now and then?
You said it bogs down upshifting. That could be a fuel pressure issue.
Find a store like O'Reilly's or Autozone that loans tools, preferably for free, and find one that has a fuel pressure gauge. Take pressure readings at various times throughout the day. When it is and isn't happening. You should see only very minor fluctuations in pressure and it should be in the area of 35 PSI.
It could also be quite a few other things. Most of these the computer will pick up on, but, for a variety of reasons, they don't trigger the CEL. They will set codes. But the computer has to be deep-scanned. You may have to go to a VW shop. Hopefully not. And you should be able to get it done free somewhere. The fuel pressure problem would also set a code.
Tuesday, July 1st, 2014 AT 9:07 AM