What should I do if there is a serious situation after the throttle is cleaned by Fit?

(My car was bought in June, 2009, with a new Fit 1.3mt) The problem that occurred a few days ago: When the front car slowed down at the red light, I immediately braked and stopped, and the tachometer dropped sharply to 4,500 rpm, and then immediately returned to the idle speed (above 700 rpm). Because the instantaneous engine speed is too low, the car shakes. After listening to the expert's advice, I went to the garage to clean the accelerator. The master sprayed a cleaning stamp on the cloth and then cleaned the throttle. But after installation, a more serious problem appeared: when coasting in neutral, the speed needle will flash up and down between 1000- 1500. When parking, the speed stops at 1200 rpm, and then slowly falls back to 700 rpm after a few seconds. Unstable idle speed and weak acceleration. When parking, turn the steering wheel or the water tank fan, and the idle speed will rise from 700 to about 1 100, and then slowly fall back. Clean the throttle valve for the second time, then configure the computer, and the fault remains the same. How do experts solve this problem now? Or what kind of tests should I do? Or should it be replaced or repaired? Thank you. Hurry up. . . . (My car was bought in June 2009, with a new Fit (check the transaction price | model details) 1.3mt). Problems that occurred a few days ago: the car in front slowed down at a red light, so I immediately stepped on the brakes to stop, the tachometer dropped sharply to 4500 rpm, and then immediately returned to idle speed (above 700 rpm). Because the instantaneous engine speed is too low, the car shakes. After listening to the expert's advice, I went to the garage to clean the accelerator. The master sprayed a cleaning stamp on the cloth and then cleaned the throttle. But after installation, a more serious problem appeared: when coasting in neutral, the speed needle will flash up and down between 1000- 1500. When parking, the speed stops at 1200 rpm, and then slowly falls back to 700 rpm after a few seconds. Unstable idle speed and weak acceleration. When parking, turn the steering wheel or the water tank fan, and the idle speed will rise from 700 to about 1 100, and then slowly fall back. Clean the throttle valve for the second time, then configure the computer, and the fault remains the same. How do experts solve this problem now? Or what kind of tests should I do? Or should it be replaced or repaired? Thank you. Hurry up. . . . If the cleaning throttle is not good, replace the spark plug and clean the oil circuit immediately. If the oil circuit is not clean for a long time, it will burn badly and vibrate seriously if it is not treated. If it is serious, it will be difficult to turn off the engine. This kind of problem is also easy to judge. When there is less oil in the tank, the jitter is more serious. It is judged that the impurity colloid moisture exceeds the standard and is brought into the combustion chamber for poor combustion. Cleaning the oil circuit with Siyoupu fuel cleaner immediately can improve the condition and completely cure the jitter problem. . . In fact, the gas station cleans the fuel tank once in 5438+0-February, not to mention our fuel tank and oil circuit. We can learn from the experience of jitter analysis. St74 10 As for the problem of high idle speed after receiving oil, the reason may be that the throttle valve or idle motor is stuck or out of its adjustment range due to carbon deposition, or the throttle valve is stuck and cannot return due to excessive carbon deposition, which will lead to an increase in idle speed after receiving oil. Many times, after cleaning the throttle, the idle speed of oil collection will rise. This is because when cleaning the carbon deposit, the carbon deposit solution enters the throttle shaft, which causes the throttle shaft and the valve base to get stuck. In severe cases, it is sometimes necessary to replace the throttle body or idle motor. In addition, after cleaning the throttle, the throttle should be initialized. If it is cleaned in an ordinary repair shop, I suggest you go to a regular 4s shop to check it again. @20 19