What Causes a Car to Suddenly Stall?
2 Answers
Reasons for a car suddenly stalling: 1. Electrical circuit failure: This could be due to low-voltage power interruption while driving. In this case, you should primarily check the ignition and starter switches, as well as the fuse box. 2. Electrical component failure: Usually caused by faults in the ignition coil, capacitor, or electronic ignition module. 3. Fuel system failure: Damage to the fuel pump, fuel line rupture, clogged carburetor fuel inlet, or an empty fuel tank. However, in such cases, the car can still be restarted, though with difficulty. 4. Sensor failure: Faults in the throttle position sensor, air flow sensor, intake pressure sensor, crankshaft position sensor, or camshaft position sensor, among others. If any sensor fails, it can also lead to stalling.
After driving for so many years, I've encountered several instances where my car suddenly stalled. Once, it happened while I was driving on an elevated highway, which was absolutely terrifying. The reasons could be fuel system issues, such as a faulty fuel pump not supplying fuel or clogged fuel injectors, especially during long trips when the engine is under heavy load. Electrical problems are also a common culprit, like aging spark plugs or faulty ignition coils leading to ignition failure. Then there are sensor malfunctions, such as a failed crankshaft position sensor, causing the engine control unit (ECU) to stop due to lack of signal. Also, don't forget to check basic things like whether the fuel tank is empty or if you accidentally pressed the ignition switch. When the car stalls, I immediately turn on the hazard lights and pull over—safety comes first. Don't risk restarting the engine; it's better to call a tow truck and have it checked at a repair shop. Regular maintenance can prevent many issues, like periodically replacing spark plugs and checking the fuel system, which helps a lot.
