The throttle is noisy when idling.

After the owner starts the vehicle, the engine of the vehicle will enter the idle state. Some car owners report that the idling sound of the vehicle is louder than before, so what is the reason for the engine idling sound to become louder?

1. Maybe the car oil is the wrong model. If the vehicle needs to be filled with synthetic engine oil, and the owner mistakenly adds mineral oil or semi-synthetic engine oil, the engine will be louder when idling.

2. It may also be that the service life of the vehicle is too long, and carbon deposits will be generated inside the engine. When the vehicle is idling, the sound is much louder than before.

3. If the engine oil is insufficient or the oil pressure is too low to lubricate the gears of the vehicle, when the owner starts the vehicle, the gears inside the engine are dry-ground, which makes the sound louder when the vehicle is idling.

4. It is also possible that the vehicle is cold started and the internal oil temperature of the engine is low. When the engine temperature rises, the idling sound of the vehicle can return to normal.