It only started happening recently. I have had this car for a month now. When i turn on my car(it's a remote starter only) the car starts shaking and under the hood the engine itself is shaking. Engine sounds fine. Also when you start driving at speed for example 30 to 40 mph the car is fine not shaking but as soon as I come to a complete stop on a red light or stop sign it starts shaking bad like it is about to stall or shut down. Fourtunaltely it didnt shut down on me yet and the problem happened twice. The check engine light has been on ever since I bought it and the dealer said i probably left my gas tank cap loose so i ignored it till now. it doesn't happen every time.