Why does the car keep stalling?
2 Answers
Common reasons for a vehicle stalling while driving include malfunctions in the ignition system or the fuel injection system. The details are as follows: 1. Ignition System: Generally, if there is a fault in the ignition system, the spark plugs won't ignite, and the air-fuel mixture cannot be combusted, causing the vehicle to stall. In this case, it is necessary to check whether the ignition wiring in the ignition system is functioning properly, whether the ignition module is working correctly, and whether the spark plugs are damaged, such as broken electrodes or cracked ceramic parts. 2. Fuel Injection System: The fuel injection system, also commonly referred to as the fuel supply system, typically works by transferring fuel from the fuel tank through the fuel pump via fuel lines to the fuel injectors, which then spray the fuel. If any component in this system, such as the fuel pump, fuel lines, or fuel injectors, is damaged, it will fail to supply the necessary fuel for the engine to operate, resulting in the vehicle stalling.
I've experienced stalling several times, and it mainly depends on whether it happens during startup or while driving. Stalling during startup is mostly due to a weak battery or an aging starter, especially common in winter. If the car stalls suddenly while driving, the problem becomes more complex—it could be a fuel pump failure causing fuel supply interruption, or a faulty ignition coil. The last time I encountered this, it was because the crankshaft position sensor failed, causing the car to lose power completely, and I had to get it towed. Another common situation is severe carbon buildup in the throttle body, which can cause the ECU to misjudge and cut off fuel. After each stall, remember to check if any warning lights are on the dashboard. The first reaction should always be to pull over immediately and turn on the hazard lights.
