My car stalled easily when it was downshifted. What is the reason?

Oil is in short supply. If it is EFI, it may be caused by uneven fuel injection by the injector. If it's a carburetor, you have to clean it, then see if the gasoline pump pumps oil normally and adjust the idle speed.

In addition, the following is the troubleshooting of the car's failure to start, for reference; The inspection items such as the car can't start, the idle speed is unstable, the speed is high and low, and the oil supply is abnormal are as follows:

1, automobile battery voltage is low; Specific detection method: test the battery voltage with a voltage range of three meters. If it is lower than 10V, it is recommended to replace it. If it is around 1 1V, it is barely used; Be prepared to be replaced. 12V or more;

2. Check whether it is caused by carbon deposition; If driving about 20,000 KM, check and clean the throttle;

3. Check, test and replace the spark plug;

4. Confirm the oil quality of the added gasoline;

5. Check the ignition switch;

6. Test and check the starter, gasoline pump, sensor and other related parts of the starting and oil supply system;

7. Don't start it immediately after being electrified again, wait for 30 seconds to 1 minute, and then ignite; See if it works;

In any of the above cases, please note that when you can't get a taxi at one time, you must call it again every 15-30 seconds to protect the battery from excessive power generation and prolong its service life.