Ok. Car has 140,000 km and started the vibration at 2000 rpm and feels like its running on 7 cylinders. Had spark plugs and coils replaced (Coils on warranty recall!) this year! But most of the time, the vibration and seemingly lack of power is terrible. Then, one day, it's perfect for 3 days and then back to this horror. I've now read it could be the flywheel. Is this a warranty issue? I drove the car down and back to Florida with this condition. Apparently I should get it fixed quickly. But where can I take it in?