What Causes Engine Shaking and Poor Acceleration?

[LaLogan]

The reasons for engine shaking and poor acceleration: 1. Excessive carbon buildup in the throttle body, fuel injectors, or inside the engine. During cold starts, excessive carbon deposits absorb too much gasoline sprayed by the injectors, resulting in an overly lean air-fuel mixture and causing engine shaking; 2. Engine misfire due to poor spark plug ignition or fuel injector atomization issues. When cylinders experience incomplete combustion or fail to combust at all, it leads to engine shaking; 3. Poor fuel quality directly affects combustion efficiency. Low octane ratings can cause engine vibration. The main reasons for poor acceleration include: 1. Contaminated fuel; 2. Clogged fuel injectors; 3. Blocked fuel filter; 4. Failed fuel pressure regulator; 5. Poor performance of electric fuel pump; 6. Faulty throttle position sensor; 7. ECU malfunction; 8. Insufficient cylinder compression, etc.