Why is there a sound when turning on the car key?
2 Answers
When you first turn on the key, the fuel pump will operate for a few seconds to ensure sufficient fuel injection pressure for starting the vehicle. Additionally, there is a self-check procedure, and some components may produce sounds, which is normal and will subside shortly. Below is more information about the fuel pump: 1. Introduction: The car fuel pump has four wires. Two of them are for the fuel level sensor (commonly known as the float), one is for power supply, and one goes to the fuel gauge. The other two wires are for the fuel pump itself, one for power supply and one for grounding. 2. Function: The fuel pump's role is to draw gasoline from the fuel tank and deliver it through the pipeline and fuel filter to the carburetor's float chamber. Thanks to the fuel pump, the fuel tank can be placed at the rear of the car, away from the engine, and positioned lower than the engine.
Last time I encountered a clicking sound when turning the key, I found the steering wheel lock wasn't fully released. Try gently turning the steering wheel while turning the key - many cars have this anti-theft design. For electronic keys, a slight relay ticking sound during unlocking is actually normal. But if you hear metal grinding noises, be careful - it could mean a broken spring inside the ignition switch or worn contacts. My old car had this issue and eventually needed a complete ignition assembly replacement. If mechanical keys don't insert/remove smoothly, check for dust in the key slot and try blowing it out with compressed air. If problems persist, it's safer to have a mechanic inspect it.
