Why does the car shake after starting?
2 Answers
Reasons for car shaking after starting: 1. Aging engine mounts, which are made of rubber. Rubber products will age over time, and hardened rubber engine mounts can cause engine vibration during operation; 2. Excessive carbon buildup in the throttle body. The throttle body is known as the engine's throat. Carbon deposits on the throttle body can cause engine shaking, so regular cleaning is necessary; 3. Poor performance in one of the cylinders. It's necessary to check the spark plugs and ignition coils. Spark plugs are wear-prone components and need to be replaced regularly.
It's quite common for my car to shake after starting, usually due to issues with some core components. For example, if the spark plugs are dirty or worn out, the ignition becomes unstable, especially noticeable during cold starts because the thickened engine oil increases friction. Another possible cause is a clogged fuel system, such as a dirty fuel filter, which prevents the engine from getting enough fuel and leads to shaking. Engine imbalance is also a factor; if one cylinder isn't working, it's like limping on one leg. A dirty air filter can also restrict airflow. If not addressed promptly, the shaking can worsen, fuel consumption may increase, and in severe cases, it can even damage the engine. I recommend warming up the car for a minute or two before driving and regularly checking the spark plugs and fuel system at a repair shop, along with cleaning carbon deposits, to avoid major problems.
