What are the reasons for car shaking after starting?
2 Answers
Here are the reasons for car shaking after starting: 1. Low ignition energy. 2. Poor fuel atomization at low temperatures. 3. Fuel requires higher ignition energy. 4. After prolonged use of the vehicle, the spark plug ignition gap becomes larger. 5. Severe engine carbon buildup. 6. Poor performance of the ignition system, with unsatisfactory spark plug firing. 7. Unstable oil pressure. Here are the solutions for car shaking after starting: 1. If it's not possible to disassemble the intake tract for cleaning, use a no-disassembly fuel system cleaning device for cleaning, although the effect is not as ideal as disassembly. 2. It is recommended to replace the spark plugs. Depending on the situation, you can clean the spark plugs or adjust the spark plug gap for continued use. If they are not in good condition, replacement is necessary.
I recently experienced severe shaking right after starting my car. After taking it to the repair shop for inspection, I learned it was due to aged engine mounts. The mechanic explained that these rubber components harden and crack over time, losing their damping effect and allowing vibrations to directly transmit into the cabin. Another possible cause could be ignition system issues, such as heavily carbon-fouled spark plugs or faulty ignition coils, resulting in some cylinders misfiring. A dirty throttle body might also be to blame - during my last maintenance, the technician warned that frequent short trips without prolonged driving can cause carbon buildup, blocking air intake and disrupting the air-fuel mixture ratio, leading to shaking. Additionally, a clogged fuel filter could starve the engine of fuel, especially in cars that have used substandard gasoline. In short, don't ignore such vibrations - inspect the engine compartment early and replace worn parts to resolve the issue. Safety always comes first.
