What caused Baron Guo Si's accelerator to get stuck?

Throttle jam requires inspection of throttle body and idle valve. Most of the cases are caused by carbon deposition in these parts, which can be solved after cleaning. It is suggested that the vehicle should clean the throttle body and idle valve every 15000 km and the fuel injector every 30000 km. If there is no sign of deviation, there is no need to change the wheels.