Dear Volvo friends, in advance: I have almost no idea about cars, but I don’t want to make any sense here, before I give my beloved V70 to the workshop and probably be pulled over the table by the friendly 😉 It’s a V70, year 1999 (he already has the newer engine in it), ran about 274,000 km, gasoline with 144 hp. I have been driving the car for 2.5 years. Since then, the ETS lamp has always been on after a few minutes, but according to the workshop no significant dr. osselklappenproblem. And this is the following problem, which occurred a little over 8 months ago, but since then not again until a few days ago. But now for it daily. And I notice during the ride, as it suddenly no longer pulls. Then the speed starts to fluctuate and goes up to approx. 3500 revolutions, without giving gas. This also remains in idle mode. I hold on the road edge, so the speed varies significantly between 700 and 1500. the MKL for the first time after that. If I leave the car for about 10 minutes, then the haunting is over and it purrs again. I suspect that at the moment it somehow draws wrong air or is somewhat jammed somewhere. I have already read about the possibility of a defective or dirty idle control. I would be happy if someone had further ideas so that I do not have to have to exchange all the parts in question in the workshop. That is the old one. thanks and warm greetings!