What Causes the Nissan X-Trail to Shake During Acceleration at 40 MPH?
1 Answers
Acceleration shaking may be caused by damaged spark plugs, poor fuel quality, or excessive carbon buildup. Damaged Spark Plugs: The most common issue causing shaking during acceleration is damaged spark plugs. Wear of the spark plug electrode gap leads to insufficient spark, resulting in incomplete combustion of the air-fuel mixture and causing shaking during acceleration. Additionally, cracks in the ceramic part of the spark plug can prevent sparking, causing one cylinder to stop working, which also leads to shaking during acceleration. 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 shaking during acceleration. It is recommended to use higher-grade gasoline after finishing the current tank and to perform a fuel system cleaning. Excessive Carbon Buildup: A dirty throttle body or excessive carbon buildup on the fuel injectors can cause issues. After driving a certain distance, a dirty throttle body may not close properly, or the idle speed control motor may get stuck, both of which can lead to high engine idle speed. Carbon buildup generated during engine operation can also cause vehicle shaking, especially during startup when the engine shakes more than usual or may even fail to start on the first attempt. Therefore, when the vehicle shakes, the throttle body and fuel injectors should be inspected first. If they are found to be dirty or have excessive carbon buildup, they should be cleaned promptly.
