What Are the Hazards of Severe Shaking When Starting a Manual Transmission Car?
1 Answers
Severe shaking when starting a manual transmission car can lead to the following hazards: 1. Aggravates engine carbon deposits: The most common cause of car shaking is a dirty throttle body or excessive carbon buildup in the fuel injectors. When there is too much carbon deposit inside the engine, the gasoline sprayed by the cold-start injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start. In this situation, the car will only start easily once the carbon deposits have absorbed enough gasoline to become saturated. After starting, the gasoline adsorbed on the carbon deposits is then sucked into the combustion chamber by the engine's vacuum, making the air-fuel mixture too rich. This fluctuation between lean and rich mixtures causes idle shaking after a cold start. The lower the temperature, the more fuel is required for a cold start, and the presence of carbon deposits will significantly affect the success of the cold start. 2. Damages the car's spark plugs: If the shaking phenomenon during the start of a manual transmission car is not addressed promptly, it can harm the spark plugs and even the entire ignition system. In severe cases, it can lead to poor ignition and spark plug misfires. 3. Accelerates the aging of engine components: Car shaking is also related to worn engine mounts. Engine mounts act as the shock absorption system for the engine, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations will transfer to the steering wheel and the cabin, causing shaking during idle.
