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What are the reasons for a car stalling?

2 Answers

Gilbert

09/06/25 6:49am

There are many reasons for a car stalling, which may involve the intake system, fuel system, or ignition system. Any component failure in these three systems could cause the vehicle to stall. It could also be an issue with the throttle body, such as throttle blockage, carbon buildup, or abnormal throttle opening. If the problem lies with the throttle body, the solution is to clean it. For manual transmission vehicles, stalling is often caused by improper clutch control. If the car suddenly stalls on a highway, you should quickly shift to neutral, restart the engine, move to the emergency lane, slow down, and stop, then call for maintenance personnel. It is recommended that car owners regularly maintain their vehicles at 4S shops and develop good driving habits to significantly reduce the likelihood of stalling.

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SanSophie

09/18/25 6:32am

As a seasoned driver with years of experience, I've encountered numerous stalling incidents caused by various reasons. The most common issue is fuel system problems, such as running out of gas without timely refueling or a faulty fuel pump failing to supply fuel, leading directly to engine stalling. The ignition system is equally crucial—worn spark plugs or excessive carbon buildup preventing ignition can cause the car to suddenly stop. When the battery ages and voltage becomes unstable, post-start stalling is particularly common. Additionally, a severely clogged air filter restricting airflow or throttle body carbon deposits significantly affecting the air-fuel ratio can make the engine "gasp for breath" and stall easily. Faulty electronic sensors like oxygen sensors may cause the ECU to misjudge and trigger stalling. I recommend regular maintenance, checking fuel and ignition components to prevent minor issues from escalating. Preventive measures include frequent oil changes and using high-quality gasoline, which can greatly reduce stalling risks. Always pay attention to dashboard warning lights while driving to detect abnormalities early—ensuring both safety and peace of mind.

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