On February 0, 2007, Ming Rui, when the car was started in the morning, the idle speed was unstable and the exhaust pipe rattled. What happened?

As for the problem of unstable idle speed in cool car, because there is no existing car, it may be caused by excessive carbon deposition in throttle, idle motor, air intake, air intake valve, combustion chamber and fuel nozzle. You should not only clean the fuel injector and intake manifold, but also check and clean the carbon deposit inside the throttle and combustion chamber. Because in the process of cold start, the carbon deposit will absorb a certain amount of mixed gas, which will lead to too thin mixed gas at start-up. In addition, the temperature is very low recently, the mixture is not atomized well, and it is difficult to start. Or because there is a problem with the carbon canister or the solenoid valve of the carbon canister, the mixed gas is too thick when starting, which will also lead to difficulties in starting. Also pay attention to check the working condition of the spark plug. And the blue smoke problem you mentioned. If the exhaust pipe emits blue smoke only when the car starts, the biggest possibility is that the valve guide and guide seat are not tightly sealed, resulting in oil leakage and further infiltration into the combustion chamber. I suggest you go to the 4s shop for on-site inspection according to the above analysis.