What Causes the Clicking Sound When the Car Won't Start?

[LeSawyer]

When the car won't start and makes a clicking sound, it could be due to the following reasons: 1. The starter motor is faulty and cannot turn the flywheel. Check if the starter motor is working when attempting to start the vehicle. 2. The battery is faulty and cannot hold a charge. If you only hear the sound of the starter when trying to start the car, it is likely due to a dead battery. 3. The fuel supply system of the vehicle is malfunctioning. Disconnect the fuel line connector on the engine, turn the ignition switch to the position where the dashboard lights come on, and observe if fuel flows out. If fuel flows, the fuel supply system is fine; if not, further inspection is needed. 4. The ignition system of the vehicle is faulty. Remove one of the ignition high-voltage wires from the engine, insert an old spark plug or another pen-shaped metal rod into the spark plug cap, and place the spark plug body or metal rod close to the engine's metal part. Start the engine and observe if there is a high-voltage spark. If not, check the ignition system for issues.