I had this problem a few months ago with my Jspec TT manual. Earlier this year, it started over fueling like crazy. It was had a strong fuel smell, blew white smoke, and had oil leaking out of the exhaust.
I had it trailered to Whifbitz and had the turbos replaced (138k miles) and other maintenance done. After all that, the over fueling still persisted on their test ride. Paul then said they swapped in a used ecu they had and it worked fine. They tried to send my ecu off for repair to their ecu guys, but they said they couldn't find the problem. They ended up sourcing me a used A/T ecu that works fine for me now.
There is always that fear that this same problem can happen again since this ecu is also used. Well, at least I have some fresh hybrid turbos now!