[agoksu]

I have been having this problem from the start. The engine is detonating, loosing power and shaking during accelarions and while climbing uphill at slow speeds.
Pay attention to 01:43 and 01:49 in the video.
http://www.dailymotion.com/video/x1x...rda-sorun_auto

No fault code is registered when the problem happens.
I went to the service center for this problem and they have upgraded the
firmware of the car to UCE50AM04. But this firmware change created another problem, engine is vibrating at idle from time to time. See this video for this new problem.

http://youtu.be/HCD5plPt4d4