What Causes Idle Vibration in the Volkswagen Santana?
2 Answers
The reasons for idle vibration in the Volkswagen Santana are: 1. An inappropriate air-fuel mixture ratio in the engine compartment, which affects engine vibration; 2. Spark plugs that have been used for too long, aging ignition coils, aging high-voltage wires of the spark plugs, and leakage issues can reduce ignition capability; 3. Carbon deposits formed on the valves and intake ports inside the engine, which can absorb a significant amount of fuel, affecting the sprayed air-fuel mixture and reducing car power, along with malfunctioning coolant temperature sensors. The Santana is a compact 4-door, 5-seater sedan with body dimensions of: length 4475mm, width 1706mm, height 1469mm, and a wheelbase of 2603mm.
I've also encountered idling vibration in the Santana. This usually happens due to engine imbalance when running in neutral. The most common cause is aged or damaged spark plugs. Over time, spark plugs lose ignition efficiency, leading to uneven operation in some cylinders. Carbon buildup on the throttle body or fuel injectors is another reason, affecting the air-fuel mixture ratio and making the vibration more noticeable. Faulty ignition coils can cause intermittent ignition, making the car shake at idle. Vacuum leaks in the intake system also create uneven pressure. Worn engine mounts reduce vibration absorption, transmitting shocks directly to the body. I recommend first replacing spark plugs and cleaning the throttle body. If the issue persists, check the ignition coils and vacuum lines. Don't delay repairs, as it could worsen component wear.
