With my V70 2.4T I’ve been having the following problem for a long time: I don’t have the same speed as a constant drive. It’s as if the speed was taken away like in waves and returned again. Not dramatic, but traceable. Now that I’m coming from the coast, it’s a little bit easier to compare. It’s as if there were waves in front of a small boat. It’s stronger if you have speeded up before, and then keep the speed (80km/h in 4th or 5th gear). But at worst, if I’m going up in a speed 30 zone in 2nd gear. I hop up the mountain like a kangaroo. Then it’s about 5km/h without moving the accelerator. Maybe someone has an idea about that? Drosselklappe has been cleaned several times by the workshop, which has brought a little improvement in the level, but the footing on the mountain is unchanged.