There is a problem of grading and beautiful cars. Please help. thank you

Mine is also Ling Shuai, a used car in 2005! I have your problem. First, there is water in the exhaust pipe. So is mine. This is the atomization of the engine, not the problem. Don't worry that stepping on the exhaust pipe with a large throttle will discharge a lot of water. Secondly, the noise of the rear wheel may be the problem of the rear wheel bearing, because the problem of the front wheel I had last month was basically the same as the problem of the rear wheel you described. Third, it is easy to delay. I'm sure it's the engine idling motor. My car has the same problem. At first, I thought it was the throttle. Later, I changed the repair shop and looked at the idle motor. Everything was smooth! Is Ling Shuai such a problem? I replaced the idle motor 100 yuan! It's okay now. Definitely not the throttle. You can remove the idle motor to see if it can shrink. If Martha's head is worn, you can change it for debugging.