Reasons for Car Vibration?
1 Answers
Some vibrations are not caused by faults, such as idle vibration due to carbon buildup in the throttle body or excessive carbon deposits in the fuel injectors. However, some vibrations are caused by mechanical component failures. First scenario: Damage to the inner CV joint. The inner and outer CV joints on the driveshaft connect the differential to the wheels. Damage to the inner CV joint can cause abnormal noises and vibrations. A loose inner CV joint with play can damage the steering ball joint and tie rod bushings. Second scenario: Broken engine mount bushings. The engine has four mounts connecting it to the frame or chassis, commonly called engine mounts, which are made of rubber. Over time, these can harden, crack, or break. Third scenario: Faulty coolant temperature sensor. If the coolant temperature sensor fails, the car's ECU will detect that the signal from the sensor is unreliable. To protect the engine, the ECU will limit engine torque, resulting in symptoms such as inability to rev up, unstable idle, and vibration. Fourth scenario: Faulty throttle position sensor. A faulty throttle position sensor prevents the ECU from identifying the throttle opening, making it unable to determine the engine's operating condition. This directly leads to unstable idle and intermittent vibration. Fifth scenario: Faulty spark plugs. Faulty spark plugs can cause the engine to misfire. Normally, four cylinders working properly maintain relative balance. If one cylinder misfires, the balance is disrupted, leading to noticeable body vibration and symptoms like poor acceleration. Sixth scenario: Faulty ignition coil. If the ignition coil fails to produce high voltage, it can cause the same "misfire" symptoms as faulty spark plugs, resulting in poor performance and vibration. Seventh scenario: Shock absorber issues. Leaking shock absorbers, worn top mounts, or fatigued suspension springs directly affect comfort and can cause the car to pull to one side or vibrate. Eighth scenario: Idle air control valve failure. The idle air control valve is responsible for maintaining idle speed by adjusting it based on engine load. If it fails, it can directly cause unstable idle and vibration.
