There is oil near the bottom of the throttle valve in Yi Rui.

What you want to ask is the reason why there is oil near the throttle in Yi Rui? The internal pressure of the engine is out of control due to the damage or aging of the engine seal. Damage or aging of the engine seal causes the internal pressure of the engine to be out of control, and it is impossible to seal the oil, which will lead to oil leakage to this area. This problem is serious and needs the help of a professional maintenance master.