What are the reasons for the idle vibration of the Volkswagen Santana?
2 Answers
The reasons for the idle vibration of the Volkswagen Santana are as follows: 1. Severe engine carbon deposits: The most common cause of car vibration is a dirty throttle or excessive carbon deposits in the fuel injector. When there is too much carbon deposit inside the engine, the gasoline sprayed by the cold start injector will be largely absorbed by the carbon deposits, resulting in a lean mixture during cold start, making it difficult to start. 2. Aging engine components: Car vibration is also related to the aging of engine mounts (also known as engine mounts). Engine mounts are actually the shock absorption system of the engine, responsible for absorbing the slight vibrations during engine operation. If the engine mounts are faulty, these vibrations will be transmitted to the steering wheel and the interior of the car, causing vibration during idle. 3. Unstable oil pressure: If the fuel pump's supply pressure is abnormal or the intake pressure sensor's value is incorrect or malfunctioning, it can also cause body vibration.
My old Santana also had idle vibration issues, driving felt like sitting on a massage chair – really uncomfortable. Usually this problem could be caused by severe carbon buildup on spark plugs, or unstable ignition due to aging ignition coils. Clogged fuel injectors might also be the culprit, as uneven fuel injection easily causes shaking. If the engine mount rubber blocks are worn out, their vibration absorption capacity would be greatly reduced. If you mostly drive short distances, carbon deposits in the combustion chamber can accumulate severely, causing intense vibration at idle. I suggest first checking the spark plugs – see if they're covered in black carbon, then try replacing them. Next, try cleaning the throttle body as dirt buildup can affect air intake. If the problem persists, it might be insufficient fuel pump pressure, requiring a professional diagnosis at a repair shop. Don't delay fixing this vibration – prolonged issues can damage the engine, negatively impact fuel efficiency, and compromise safety.
