I love what you guys are doing, I wish I had a scooby or a Evo. I have an 2001 Audi S4 Twin Turbo and opensource tuning is something to be desired for this platform. I have a vag cable for this car in the mail and will try and get some logs. I have found that this car uses ME 7.0 Motronic with electronic throttle control.
Some logs from apr program to show you what is going on http://ctny.audiworld.com/mark/s4/ecux/
