I was saying that the car is jerking, feeling like there is a misfire when driving and having 1300-1500 rpmFor those who are having this issue, I do want to clarify the terminology you should use when speaking to the service department. To avoid any confusion. I would not recommend using the word shimmer to describe the subtle vibration you feel. Shimmer technically is a characteristic of light and does not really work well in the scenario. Instead, I would recommend using the word shudder, or shiver, or even shimmy if you want to use a more fun word.