HI, wants to convert my Audi V6 2.6l ABC year 1994 from Euro1 to Euro 2 with a cold running controller from TwinTek. Can you save a lot of taxes… Now my question is there longer experience someone has had and can report about problems, idling fluctuations etc. Is the idling in the cold state changing? In the warm state the thing is out and has no influence anymore or? thank you