Getz – Loss of power and jerking – Werkstadt detects no error

Hello together! I have with my Getz BJ 11/09 since the first oil change at 1,000km the problem that he always jerks again. It feels like he’s running undertoury, but he doesn’t do it, even if you switch from the 4th gear to the 3rd gear at 3,000 revolutions he always bumps over the streets. Meanwhile it is so bad that I don’t come from the spot in the morning when the motot is cold anymore. He takes garkei gas more, so that I have to drive at some point to the right. The problem is that I have already driven 30km on the highway and the engine should actually be warm (see that unfortunately the Getz doesn’t have any indication). It feels like someone is kicking me on the brake… The engine warning light flashes every time, but doesn’t stay on. At the beginning, according to the factory town, I should just push it “only” and the warning light just hits w Then my car was there for a long time but could not find anything, since my warning light no longer shines permanently, but only flashes… Strange! Mistakes could not be read out either… I feel like I’m being completely fucked up! I have already mentioned the crankshaft problem, I would only be smiled at, “where I would have been here…” After I had to stop again today, since I blocked the highway at 40kmh, I have a My guarantee expires in November and I don’t want to sit on the problem!!! If someone has a tip on how to keep on acting if I’m now told that no mistake was found. Thank you in advance!