What are the causes of idle vibration in the New Vision car?
3 Answers
The causes of engine idle vibration in the New Vision car include: 1. Abnormal water temperature, usually caused by insufficient coolant, a stuck thermostat, non-functioning fan, or inaccurate temperature switch, which can be resolved by fixing these issues; 2. Clogged fuel injectors, where gum deposits in gasoline can block the injector nozzles, causing uneven fuel spray from each injector and resulting in inconsistent cylinder operation and engine vibration; 3. The air filter, designed to protect the engine and reduce wear, typically needs replacement around 10,000 kilometers. Delayed replacement can lead to insufficient air intake, causing low idle speed and engine vibration, which can be resolved by replacing the filter element; 4. Carbon buildup in the throttle body and idle valve. Over time, carbon deposits and oil sludge can accumulate in the throttle body, idle valve, and intake ports, obstructing airflow and affecting idle stability, leading to vibration. This can be resolved by inspecting and cleaning these parts with a cleaning agent.
After driving the New Vision for so many years, idle vibration is indeed a common issue. Usually, the first thing to check is the engine mount rubber pads. If they age, they lose their cushioning effect, causing even the steering wheel to shake. Faulty spark plugs are also troublesome—if the gap is too large, the ignition becomes unstable, making the car jerk when idling. Dirty fuel lines are even worse; when the fuel injectors are clogged with carbon deposits, the fuel supply becomes intermittent, which is most noticeable at idle. A vacuum leak in the engine compartment can also cause this, as pressure imbalance makes the engine 'dance.' Another often overlooked culprit is a faulty oxygen sensor, which disrupts the air-fuel ratio. If you encounter this issue, don’t push through it—head to the shop for a computer diagnostic to pinpoint the specific trouble code.
My Geely Vision started shaking badly at idle after just 30,000 kilometers, with noticeable vibrations in the seats. There are three main points to check: First, a dirty throttle body - when I disassembled and cleaned it myself once, the carbon buildup looked like black sesame paste, and blocked airflow can easily cause shaking. Second, aging ignition coils - last time the mechanic detected poor performance in one cylinder causing uneven power output. Third is fuel quality issues - after filling up with cheap gas at a private station once, the shaking started the very next day, but switching to Sinopec 95-octane improved things significantly. While engine mounts aren't expensive, replacing them requires lifting the engine. I recommend cleaning the throttle body every 20,000 km and checking spark plug condition during regular maintenance.
