What are the reasons for severe shaking when the car just starts?
3 Answers
The reasons for severe shaking when the car just starts are: 1. Clogged fuel system; 2. Aging engine components; 3. Severe carbon buildup in the engine; 4. Incomplete combustion in the cylinders; 5. Poor tire balance; 6. Deformed wheel rims; 7. Deformed drive shaft; 8. Poor ignition system performance; 9. Low engine temperature; 10. Low lubricant temperature. The steps to start a car are: 1. Insert the key into the ignition switch, turn it up one notch to activate the fuel pump for oil supply and allow the electrical equipment to self-check; 2. Press the clutch and turn the key further up to start the vehicle; 3. Depress the clutch, shift gears, and release the handbrake.
I recently bought a used compact car, and it shook violently when starting, with the entire steering wheel wobbling. It gave me quite a scare, so I immediately took it to a repair shop for inspection. The mechanic told me common causes include worn-out spark plugs or excessive carbon buildup, insufficient oil pressure during cold starts leading to poor fuel supply, and faulty ignition coils which can also cause shaking. He advised me to regularly change the engine oil and air filter, and to keep the fuel system clean. I learned a key point: if the shaking isn’t addressed promptly, it can accelerate engine wear and even affect the overall lifespan. After replacing the spark plugs and cleaning the carbon deposits, the car now starts much more smoothly. Regular maintenance is truly important, especially for novice car owners like me—don’t wait until small issues become big problems to regret it.
I'm quite interested in the internal structure of cars and often study car issues on my own. Severe shaking during startup is usually attributed to ignition system failures, such as carbon buildup on spark plugs causing inaccurate ignition, or problems with the ignition coil. Additionally, the fuel system should not be overlooked; the fuel pump may supply fuel slowly in cold weather, leading to shaking. Loose engine mounts are also a factor, and if they're damaged, they can cause the car body to become unstable. For prevention, I recommend using high-quality engine oil and regularly cleaning carbon deposits. When addressing the issue, start by reading the fault codes, then use a multimeter to test the circuits. Don't underestimate minor shaking, as it may indicate larger hidden dangers, such as sensor failure. Always keep an eye out for abnormalities and get an early inspection if anything seems off.
