In 2003, Li Xia cool car idling. After driving for more than ten minutes, the car shakes, sometimes the car stops, the throttle is newly changed, and the computer tests are normal. Please give me some

In 2003, Li Xia cool car idling. After driving for more than ten minutes, the car shakes, sometimes the car stops, the throttle is newly changed, and the computer tests are normal. Please give me some advice. Thank you. Check the water temperature sensor, and the EFI vehicle can judge the fuel injection quantity by the water temperature (water temperature is one of the bases for computer to calculate the fuel injection quantity). Oil is rich at low temperature and thin at high temperature. If the sensor is broken and keeps sending low-temperature signals to the computer, then the mixture will always be thick and weak, wasting oil. Check that the insulating porcelain part in the center of the spark plug is often black (brick red, yellow white is normal).