Why Does the Throttle Make a Squeaking Sound When Turned with the Key?
2 Answers
When turned with the key, the throttle makes a sound because it is resetting. Reasons for the throttle making noise: When turned with the key, the throttle makes a sound as part of its resetting action. After each shutdown, the throttle seeks its proper position, which is also part of the self-check process. Function of the throttle: It is a controllable valve that regulates air intake into the engine. The air mixes with gasoline in the intake pipe to form a combustible mixture, which burns to generate power. By accelerating or decelerating, it enhances the vehicle's power, enabling the car to move. Consequences of throttle malfunction: It can lead to incomplete sealing of the cylinders, leakage of the air-fuel mixture, insufficient cylinder pressure, difficulty in ignition, and incomplete combustion. If a malfunction occurs, it is recommended to have it repaired at a 4S shop.
A while ago, my car also made squeaking noises when starting. At first, I thought it was an issue with the key ignition, but later when my mechanic buddy checked it out, he said the throttle shaft was lacking lubrication. Turns out, the throttle is connected to the mechanical parts of the accelerator pedal, and with all the stop-and-go driving, dust had built up inside, drying out the lubricant and causing that weird grinding noise when turning. If not addressed in time, the shaft could seize up, leading to sluggish throttle response and higher fuel consumption. I tried disassembling the throttle myself, cleaning off the grime with gasoline, and applying some grease for lubrication—sure enough, it became much quieter. Just a heads-up though: remember to disconnect the battery before working on it—safety first. Regularly maintaining and checking these small areas can save a lot of trouble, or else it might feel like the car is constantly complaining about something when driving.
