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I am sorry haha, it was tuned long time ago i bought the car 2 years ago. And now i have had problems with power loss and i restored it to orginal and Still same problem with power loss the tuner cant find the problem and he Said something about pipe leak.

Hello everyone, hi it's like this that i have an oaudi rs6 c6. it was tuned yesterday but I restored it to original. sometimes the car runs well and the car runs like a rocket. but the last few days it is going extremely badly and sometimes it is going well. I did some times today orginal 0-100 5.3k...