What Causes Slight Idle Vibration in the Sagitar 1.4T?

[VonCamila]

Here are the reasons for slight idle vibration in the Sagitar 1.4T: 1. Dirty throttle. If the throttle valve is too dirty, it reduces the intake volume in the intake manifold. When this intake volume fails to meet the normal air-fuel ratio, it causes engine vibration. 2. Excessive carbon buildup inside the engine. Since the engine intake valve ports are surrounded by carbon deposits over time, prolonged exposure can lead to poor valve sealing, and in severe cases, engine vibration. 3. Faulty spark plugs or ignition coils. If spark plugs are not replaced for a long time, the electrode gap becomes too large, affecting the ignition timing. This not only causes engine vibration but also increases fuel consumption. The same applies to damaged ignition coils. 4. Clogged fuel lines or fuel injectors. A dirty fuel filter causes unstable fuel pressure, and poor atomization from the fuel injectors leads to incomplete combustion, resulting in engine vibration.