What Causes the Car to Shake After Starting?
2 Answers
The reasons for car shaking after starting: 1. Aging engine mounts: Engine mounts are usually made of rubber, and rubber products tend to harden over time with prolonged use. When rubber engine mounts age and harden, they can cause the engine to shake during operation. 2. Excessive carbon buildup in the throttle: Carbon deposits on the throttle can lead to unstable engine idling. 3. Poor performance in one of the cylinders: Check the spark plugs and ignition coils. Spark plugs are wear-and-tear parts that require regular replacement. 4. Poor fuel quality: Low-quality fuel has poor volatility. During a cold start, the engine block temperature is low, making it difficult for the fuel to atomize. This results in inadequate mixing of fuel and air in the cylinders, causing difficulty in starting and severe shaking of the car.
The issue of car shaking after starting is quite common in my years of driving experience. It's usually caused by worn-out spark plugs or carbon buildup leading to poor ignition; when I first bought a used car, it had similar symptoms, and replacing the spark plugs improved it significantly. Another common reason is a clogged air filter or a misfiring cylinder, causing engine vibration; if it's particularly noticeable during cold starts, it might be due to a dirty throttle body needing cleaning. My neighbor's car once shook due to a faulty fuel pump, which stabilized after being repaired. It's advisable to start troubleshooting from simpler causes, such as checking the spark plugs and fuel injection system, and avoid high-speed driving to prevent worsening the issue. Regular maintenance like cleaning carbon deposits can also prevent shaking.
