A Volkswagen Santana 2000GSi car with a mileage of about 186000KM. The owner reflected that the car was stalled and stopped when it was in a traffic lane. After returning, the engine failed to start. After a period of time, it started again and started smoothly. From then on, the engine starts smoothly and it is difficult to start the hot car. It is necessary to wait for a period of time. After starting, the idle speed is smooth, the speed is smooth and the shift transition is smooth. The failure alarm lamp of the dashboard is always not bright.