If your car stalls when it is idling, it could be due to a variety of issues. Here are some common causes of stalling while idling and how to address them:

1. Dirty air filter: A dirty air filter can cause your car to stall while idling because it restricts the flow of air to the engine. To prevent this, be sure to replace your air filter regularly according to your manufacturer’s recommendations.
2. Fuel system issues: If your car is stalling when it is idling, it could be due to issues with the fuel system. This could include a faulty fuel pump, a clogged fuel filter, or a leaking fuel injector. To diagnose and fix these issues, it is important to consult with a mechanic.
3. Ignition system problems: The ignition system is responsible for delivering the spark needed to ignite the fuel in the engine. If there is a problem with the ignition system, it can cause the car to stall while idling. This could be due to a faulty spark plug, a bad ignition coil, or a problem with the ignition system wiring. To diagnose and fix these issues, it is important to consult with a mechanic.
4. Engine mechanical problems: If your car is stalling when it is idling, it could be due to a problem with the engine itself. This could be due to issues such as a worn timing belt, a faulty valve, or a problem with the engine’s compression. To diagnose and fix these issues, it is important to consult with a mechanic.

In conclusion, if your car stalls when it is idling, it could be due to a variety of issues, including dirty air filters, fuel system problems, ignition system issues, and engine mechanical problems. To diagnose and fix these issues, it is important to consult with a mechanic. Regular maintenance and timely repairs can help prevent stalling while idling and ensure that your car runs smoothly.