What is engine stalling?
2 Answers
Engine stalling refers to an uncontrollable process, whether intentional or unintentional, during the engine's operation. During normal driving, it manifests as the phenomenon where the output speed of the torque converter becomes zero while the engine is running, meaning the pump wheel rotates while the turbine remains stationary. When the engine suddenly stops working, the vehicle will coast due to natural inertia, causing significant damage to the engine. Below is a detailed introduction: 1. Causes of stalling: The reasons for stalling usually involve the car engine losing control, including shutdown, unresponsive throttle, or runaway acceleration. However, the primary causes are faults in the fuel, electrical, water, or mechanical systems, such as a stuck throttle cable, jammed throttle motor, poor contact in the throttle sensor, open circuits, excessively high engine temperature, lack of gasoline, engine oil, or coolant.
Engine stalling simply means the car suddenly shuts off while driving, which is quite common. I've encountered it many times. Common causes include fuel system issues like an aging fuel pump failing to deliver sufficient fuel or a clogged fuel filter blocking fuel supply; ignition system problems such as worn-out spark plugs failing to ignite; and restricted air supply due to a dirty air filter blocking the intake. Low battery voltage or a stuck idle control valve can also cause the engine to stall. When stalling occurs, don't force it—immediately pull over with the handbrake engaged and turn on hazard lights. For prevention, it's recommended to check the fuel and air filters every three months, replace spark plugs every one to two years, and warm up the car for a few minutes before highway driving. In short, addressing minor issues promptly can prevent major problems—cars, like people, can turn small ailments into big troubles if neglected.
