Why is the new car shaking a bit?
2 Answers
Manual transmission cars experience shaking due to gear disengagement. The main reasons for engine shaking are as follows: 1. Dirty air filter: If the air filter is not replaced in time, it can cause insufficient air intake, leading to low idle speed and engine shaking. Simply replacing the filter element can solve the problem. 2. Broken high-voltage line: A broken core in the high-voltage line can affect ignition and cause engine shaking. Use a multimeter to measure the resistance and replace the one with significantly higher resistance. 3. Spark plug issues: After 30,000-40,000 kilometers, the ignition efficiency of spark plugs noticeably decreases, affecting ignition. 4. Low idle speed: The engine idle speed is preset in the computer. When the RPM drops below a certain range, the car's computer will automatically adjust it. 5. Abnormal water temperature: The engine operates within a normal temperature range. High water temperature can cause early ignition timing, changes in the air-fuel mixture, thinning of oil viscosity, and reduced lubrication performance. 6. Clogged fuel injectors: Residue in gasoline can clog the injector nozzles, causing inconsistent fuel injection and uneven cylinder operation, leading to engine shaking. 7. Carbon deposits and oil sludge blockage: Over time, the throttle body, idle valve, and intake ports can accumulate carbon deposits and oil sludge, obstructing airflow and affecting idle stability, resulting in shaking. 8. Low cylinder pressure: Engines with 3, 4, 5, 6, or 8 cylinders may experience misfiring if one cylinder is not working properly, causing the engine to shake.
I've noticed that slight shaking in new cars is quite common, likely caused by minor issues in the ignition system, such as improperly installed spark plugs or ignition coils. It could be due to improper adjustments before leaving the factory or developing problems after extended use, especially noticeable during low-speed starts or high-speed driving when the entire body feels like it's shaking. I've personally checked similar situations by first confirming if the spark plugs are loose or dirty. If the shaking is noticeable even on the steering wheel, it's mostly the engine acting up. The engine in a new car is still in the break-in period, so driving more or getting professional adjustments to the fixtures can help a lot. Remember to address it early to avoid prolonged issues affecting fuel efficiency and safety. Also, drive smoothly during daily use, avoid sudden acceleration, and let the car gradually adapt to the break-in period.
