What Causes Engine Shaking During Car Acceleration?
3 Answers
Car acceleration shaking can be attributed to the following reasons: 1. Engine malfunction; 2. Insufficient cylinder pressure; 3. Faulty half-shaft; 4. Fuel system malfunction; 5. Aging engine components; 6. Ignition system failure. Solutions for car acceleration shaking are as follows: 1. Replace filters: including oil filter, gasoline filter, fuel filter, and air filter. Replacing filters can improve filtration efficiency, reduce impurities, and enable more complete engine combustion; 2. Clean carbon deposits: including spark plug carbon deposits, throttle carbon deposits, and cylinder carbon deposits.
I've been driving for over a decade and have encountered engine shaking during acceleration several times. It's usually caused by unstable ignition due to worn-out spark plugs, which is particularly noticeable during acceleration. If spark plugs accumulate too much carbon deposits and fail to ignite, the cylinder misfires, resulting in shaking. Issues with the fuel system, such as clogged fuel injectors preventing proper fuel delivery and causing incorrect air-fuel mixture, can also lead to severe shaking. A dirty air filter restricting airflow can produce similar symptoms. I recommend regular inspections of these components, replacing spark plugs every 20,000 to 30,000 kilometers, and cleaning throttle valve carbon buildup. Severe shaking may damage engine mounts or cause emission problems, so it's best to visit a repair shop promptly.
Common causes of acceleration shaking during car repairs are often ignition system failures. I would use a diagnostic scanner to check for trouble codes. If it indicates a misfire in a specific cylinder, it could be due to faulty spark plugs or ignition coils. Loose high-tension wires may also cause weak sparks. On the fuel side, clogged fuel injectors or insufficient fuel pump pressure leading to uneven fuel supply can cause shaking. In the air system, intake manifold leaks causing air-fuel ratio imbalance. Faulty sensors like oxygen sensors can prevent the ECU from properly adjusting the mixture. It's recommended to first check and replace spark plugs, then inspect fuel pressure and circuits if the issue persists. Timely repairs can prevent more severe knocking damage.
