What causes severe shaking during cold start of Lavida?
2 Answers
Severe shaking during cold start of Lavida may be caused by carbon deposits, weak ignition, low cylinder pressure, or substandard fuel. Below are the reasons and specific solutions for severe shaking during cold start of Lavida: 1. Excessive carbon deposits in the intake tract require timely cleaning. 2. Substandard fuel quality, it is recommended to use standard quality fuel. Low fuel pressure or cylinder pressure may lead to insufficient power, etc. 3. Mechanical failures in components such as ignition coils, spark plugs, or fuel injectors may cause cylinder misfire; it is advised to replace ignition coils, spark plugs, fuel injectors, etc. 4. Excessive carbon deposits in the engine. Since the structure of carbon deposits resembles a sponge, once carbon deposits form on the valves, part of the fuel injected into the cylinder each time will be absorbed, resulting in a leaner actual mixture entering the cylinder. This leads to poor engine performance, manifesting as difficulties in cold start, unstable idle, poor acceleration, backfire during rapid acceleration, excessive exhaust emissions, increased fuel consumption, and other abnormal phenomena, thereby causing engine shaking during cold start.
I've been driving for over a decade and encountered many instances of cold start shaking issues with the Lavida, primarily caused by incomplete combustion due to carbon buildup in the engine. When the car is cold, unstable gasoline combustion easily leads to shaking. Additionally, aging spark plugs or faulty ignition coils can affect ignition timing. Carbon deposits in the throttle body can also obstruct air intake, making the engine struggle to breathe during startup. High oil viscosity results in insufficient lubrication at low temperatures, increasing internal friction. I recommend regular carbon cleaning and spark plug replacement to effectively prevent this; if the shaking is severe, it's best to have a professional shop inspect the fuel system and engine mounts to avoid worsening vibrations that could lead to unstable driving or even safety issues. With proper maintenance, the vehicle starts much more smoothly and becomes more fuel-efficient.
