What Causes the Engine Light to Illuminate and the Car to Shake?

[VonGriffin]

The reasons for the engine light illuminating and the car shaking are: 1. Poor combustion of the air-fuel mixture in the engine. When the mixture in the cylinder is too rich, the vehicle may experience knocking and shaking. Conversely, when the mixture is too lean, the vehicle may exhibit symptoms of weak acceleration. 2. Malfunctions in the working conditions of spark plugs, high-voltage wires, and ignition coils, poor performance of the ignition system, or inadequate spark plug firing. 3. Abnormal fuel supply pressure or faults in the intake pressure sensor. Engine maintenance precautions: 1. Do not blindly remove the thermostat due to high engine temperature. Without the thermostat, the coolant can only circulate in a large loop, unable to regulate cooling intensity, making it difficult to maintain the engine at an optimal operating temperature. This can result in the engine frequently operating at lower temperatures, leading to reduced power, accelerated wear, and increased fuel consumption. 2. Drive within the normal temperature range specified in the car's user manual to ensure the engine's longevity.