Question: A 2014 BMW X1 was flooded when the vehicle was driving in the water. After the engine was repaired and assembled, it was found that the engine was shaking, but the test results were normal. What is the problem?
Answer: I don’t know if the idle speed and acceleration of the vehicle are affected? Because it is a flooded vehicle, you should check whether there is water in the fuel tank and whether there is a problem with the carbon canister system. These reasons will cause shaking. In addition, the timing accuracy must be confirmed. The valve rocker arm has fallen off before, which can also cause shaking, often accompanied by abnormal noise. You can listen to the engine carefully.