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Why does the engine stall automatically?

2 Answers

Venus

07/24/25 1:41pm

Here are the reasons why the engine stalls automatically: 1. Sudden engine stalling during driving is caused by electrical circuit failure. This may be due to low-voltage power interruption during driving, leading to stalling. In this case, you can mainly check the ignition and starter switches, as well as the fuse box. 2. Low-voltage circuit short circuit causes stalling. In this situation, the stalling is intermittent. Check the vehicle's low-voltage circuits. Sudden stalling during driving due to component failure. This problem is usually related to the ignition coil, capacitor, or electronic ignition module. The engine may start initially, stall after a while, start again, and then stall once more. 3. Fuel system failure, such as a damaged fuel pump, ruptured fuel line, clogged carburetor fuel inlet, or an empty fuel tank.

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StAmelia

08/11/25 7:40am

The engine suddenly stalls on its own, and I've encountered this issue a few times—it's quite annoying. The most common causes are insufficient fuel or problems with the fuel pump, such as a faulty fuel pump or a clogged fuel filter, preventing fuel from reaching the engine. Electrical issues also play a big role; problems with the ignition system, worn spark plugs, or faulty coils can cause the engine to fail to start and then stall. Sensor problems shouldn’t be ignored either, like a stuck idle control valve or a malfunctioning oxygen sensor, which can disrupt the computer's ability to regulate fuel and air mixture properly. Last time, I forgot to close the air intake after washing the car, and water seeped in, causing a short circuit and stalling. I recommend checking the fuel cap every time you refuel, and if any dashboard warning lights come on, take the car to a shop—breaking down on the road is too dangerous, so don’t cut corners when it comes to safety. Remember, regular oil changes and air filter replacements can prevent issues and extend your car's lifespan.

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