In 2002, the EPC light of four-eye POLO car was on, the idle speed was unstable, and the throttle failed. What should I do?

2002 is a bit long. Try to clean up the carbon deposit on the accelerator. My car is shaking badly, especially when I first got on the bus in the morning. It's much better after washing the accelerator. If it doesn't work, change it to three yuan. As for the throttle failure, it should have little to do with the unstable idle speed. It is estimated that there is something wrong with the throttle line.