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What Are the Causes of Shaking and Weakness in a Sedan's Engine?

1 Answers

McNatalie

07/29/25 10:02am

The causes of shaking and weakness in a sedan's engine are: 1. Damaged spark plugs: If the spark plugs are damaged, wear on the spark plug electrode gap can lead to insufficient ignition, causing the air-fuel mixture to not burn completely and resulting in shaking during acceleration. Cracks in the ceramic part of the spark plug can also prevent it from firing. 2. Poor fuel quality: This can lead to poor atomization by the fuel injectors. Using higher-grade gasoline and performing a fuel system cleaning can help. 3. Excessive carbon buildup: After driving a certain distance, a dirty throttle body can cause it to not close properly or the idle speed stepping motor to stick. It is important to check the throttle body and fuel injectors and clean them promptly.

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