Excuse me, what is the jitter of 1.6 sega idle speed?

09 sega belt 1.6 automatic transmission, there was occasional irregular jitter when idling some time ago (even after hot car), but everything was normal when accelerating, and the throttle valve was just washed. I personally analyzed whether it was caused by the aging of the rubber feet of the engine, but the rubber feet were very dry by visual inspection. I'd like to ask an experienced person to tell me that thanks to Sega, model 09 of 1.6 automatic transmission, the idle speed occasionally fluctuated (even after the hot car) some time ago, but the acceleration was normal and the throttle was just washed. Personally, I analyze whether it is caused by the aging of the rubber feet of the engine, but the rubber feet are very dry by visual inspection. I would like to ask an experienced person to tell me that vehicle jitter is a common phenomenon in gasoline vehicles at idle speed, but the phenomenon of body jitter can not be ignored to prevent major problems in vehicles. What is the reason for the body shaking at idle speed? 0 1 The water temperature sensor is out of order, and the temperature sensing is wrong. The computer will inject oil according to the wrong temperature, so it is natural for the oil quantity to be less jittery. Unstable oil pressure, incorrect intake pressure sensor value, and poor work will all cause the body to shake. Engine parts or aging, engine foot aging may make the body shake. If carbon deposits appear in the valve and air intake of the engine, ecu will make a wrong judgment, because carbon deposits can absorb a proper amount of fuel (just as water flows through the river bank and soil absorbs water). The computer actually controls the injection of 100 parts of oil and gas, but only 90 parts actually enter the cylinder (10 parts are absorbed by carbon deposits), so even if the remaining 90 parts of mixed oil and gas are fully burned, the required power cannot be achieved, and the jitter phenomenon is inevitable. @20 19