Why does a car stall while driving?

[LouisFitz]

The reasons why a car stalls while driving are: 1. When there is excessive carbon buildup in the throttle, releasing the accelerator during driving may cause the engine to stall; 2. Power supply failure, usually due to a damaged ignition coil, resulting in no high voltage to all spark plugs; 3. Electronic component failure. Solutions for a car stalling while driving include: 1. Ensure to refuel with high-grade gasoline at qualified gas stations; 2. Thoroughly clean the fuel system; 3. Perform regular maintenance. Common car faults include: 1. Excessive fuel consumption; 2. Excessive lubrication oil consumption; 3. Abnormal smoke from the exhaust pipe; 4. Steering deviation; 5. Steering wheel wobble or vibration.

[Kent]

I've been driving for many years, and when it comes to the issue of a car stalling while driving, the most common cause is a problem with the fuel system. For example, the fuel pump may not be working properly, unable to supply fuel steadily, or there may be impurities in the fuel line clogging the injectors, leading to insufficient air-fuel mixture and the engine not getting enough fuel. Another major reason could be an ignition system failure, such as worn-out spark plugs failing to ignite or a faulty ignition coil preventing proper ignition. It might also be an electrical issue, like a failing alternator causing the battery to drain or a malfunction in the control computer. Mechanical problems, such as a dirty air filter blocking the intake, can also cause the engine to stall due to lack of oxygen. Poor maintenance often leads to these issues. If this happens, immediately turn on the hazard lights, pull over safely, and check the problem. Avoid attempting to restart the car to prevent further damage.

[LeAshley]

As someone familiar with cars, engine stalling while driving is often a systemic failure. First, check the fuel system – unstable fuel pump pressure or clogged fuel filters can cut off fuel supply. For ignition issues, faulty coils or spark plugs can interrupt combustion. Electrical problems like aging batteries or burnt relay contacts can also shut down the engine. Additionally, inaccurate signals from air flow sensors or oxygen sensors may cause the control computer to misjudge the engine state. There's also the possibility of automatic start-stop system malfunctions. The key is to observe symptoms: if the car stalls during acceleration, it's likely a fuel issue; stalling at idle may indicate carbon buildup or ECU failure. If this happens, stay calm, slowly pull over to a safe spot, and call for assistance.

[SanJourney]

Last time I was in a hurry, my car suddenly stalled and stopped halfway, which was quite alarming. It turned out to be severe carbon buildup on the spark plugs preventing ignition, and replacing them fixed the issue. This is common during long-distance driving or in older vehicles, where poor fuel quality can clog the system or cold temperatures may cause fuel line blockages. False sensor readings can also lead to incorrect computer operations. In manual transmissions, improper clutch use might cause stalling, but while driving, it's mostly due to mechanical failures. Regularly using high-quality engine oil and cleaning carbon deposits can help avoid such embarrassing situations.

[AshlynFitz]

Engine stalling while driving poses significant safety hazards, especially on expressways, primarily caused by fuel or ignition interruptions. A malfunctioning fuel pump can directly cut off supply, while failed spark plug ignition leads to immediate engine shutdown; electrical issues such as aged wiring or blown fuses also disrupt power; a clogged air filter restricts airflow, causing the car to lose power, shake, and then stall. In such an event, immediately turn on hazard lights and pull over to the right to avoid rear-end collisions; avoid repeated ignition attempts, check fuel levels and basic instrument readings; afterward, conduct a thorough inspection to ensure the alternator voltage is stable or the ECU programming is correct.