Well, after 4 new plugs and a new O2 sensor the car is still flaky. It has a mind of its own - sometimes it's fine, and other times it feels like one cylinder isn't firing. The most annoying thing is that it's not storing any OBD codes.

So I think that I'm going to need to borrow that VAG-COM for a while. if that's ok. I suspect that one of the coilpacks is going bad.