What Causes a Car to Shake and Lose Power?

1 Answers
GeorgeRose
07/29/25 3:53pm
The reasons for engine shaking and power loss in a car are as follows: 1. Damaged spark plugs: If the spark plugs are damaged, the gap between the electrodes may wear out, leading to insufficient spark and incomplete combustion of the air-fuel mixture, resulting in shaking during acceleration. Additionally, cracks in the ceramic part of the spark plug can cause misfiring, leading to a cylinder not working properly and causing shaking during acceleration. 2. Poor fuel quality: Low-quality gasoline can result in poor atomization by the fuel injectors, leading to incomplete combustion of the air-fuel mixture in the cylinders and causing the engine to shake and lose power. It is recommended to use higher-octane gasoline after emptying the current tank and perform a fuel system cleaning. 3. Unstable fuel pressure: If you have already cleaned the engine carbon deposits, changed the oil and spark plugs, but still experience shaking at idle, it is advisable to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor. Abnormal fuel pump pressure or incorrect readings and poor performance of the intake pressure sensor can cause the car to shake. In such cases, check the fuel pressure and replace components if necessary.
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