My car is. Driving very poorly for example it drives ok wen it is still cold but once it gets warmed up it starts jerking down the road and goes then acts like its gona. Stop then. Goes n. Jerks again m. Starts going regular again. Then starts jerking again as down. Troad then. Drives fine again. What's even more strange is it seems. To drive even worse wen the heat is. Turned on in the car? Do you have any idea what the problem could be with my car?