Need help. My 159 2.2 JTS had a peculiar problem yesterday. When I first powered her up, the initial idle rev was around >2k. Normally it hovers around 1k. On the road, the acceleration was very jerky. The car slowly picked up speed, and all of a sudden, power was lost although my foot was still planted on the accelerator. This happened in all gears.
However, all of a sudden, the problem went away by itself. This morning the car behaved normally. Is this something more sinister that I need to be concerned about?
Any advice will be greatly appreciated.