What are the reasons for a sudden engine stall in a BMW 320?
2 Answers
BMW 320 suddenly stalls for the following reasons: 1. Check if the battery voltage is too low: You can turn on the headlights and some electrical devices to observe whether the dashboard and interior lighting show noticeable dimming during the startup process. If they dim, it indicates insufficient battery voltage. 2. Excessive carbon buildup in the intake pipe: Too much carbon buildup on the throttle valve or idle speed control valve can prevent the engine from achieving the required air-fuel ratio for the mixture, making it impossible to start the vehicle. This can also cause repeated engagement of the magnetic clutch and starter relay, producing a clicking sound. 3. Insufficient fuel supply in the fuel system: This issue is similar to excessive carbon buildup in the intake pipe, as it also prevents the engine from achieving the required air-fuel ratio for the mixture, leading to failure to start the vehicle.
I've been driving a BMW 320 for a while, and sudden stalling is quite common. The most likely issue is with the fuel system, such as a faulty fuel pump or clogged fuel lines, causing fuel supply interruption. The ignition system is also prone to failure, like worn spark plugs or defective ignition coils, cutting off engine power instantly. Additionally, the electronic control unit (ECU) or sensors, such as the mass airflow sensor or crankshaft position sensor, might malfunction, sending wrong signals and causing the car to shut down. A dead battery or faulty alternator not charging can also lead to voltage fluctuations and stalling. In winter, frozen fuel lines or poor fuel quality might be the culprit. When the car stalls, immediately turn on hazard lights and pull over safely—don't force it to keep running. Quickly visit a mechanic to scan for trouble codes and ensure fuel filters and spark plugs are replaced during the next service. Safety first.
