Suzuki Tianyu SX4 two boxes 1.6, mileage130,000. It was purchased on 10. The idle speed of the cold car is normal, and the idle speed of the hot car is unstable.

According to your description, the general reason for this situation is that the oxygen sensor is abnormal or there is too much carbon deposit. You need to use a decoder, retrieve the fault code, read the data stream, thoroughly clean and replace the aging spark plug for troubleshooting, and remove the throttle and nozzle. If necessary, the throttle assembly needs to be replaced.