What is the reason why there is oil in the accelerator of the car?

This is normal because of the exhaust pipe. Exhaust gas from the engine is recirculated to the air intake and accumulated over time, which will form dirt on the throttle.

It is the most important part of the throttle EFI automobile engine system. Its upper part is the air filter, and the lower part is the engine body, which is the throat of the automobile engine. Failure to clean the throttle for a long time will lead to errors in the opening of the throttle, and air with impurities will enter the combustion chamber of the engine, resulting in abnormal engine operation, mainly manifested in unstable idle speed, sudden feeling of closing the throttle when driving, reduced power, even difficulty in starting, and increased fuel consumption.

The traditional throttle valve is that the accelerator pedal is directly connected with the opening of the throttle valve through steel wire or connecting rod, so as to control air intake and fuel injection. Electronic throttle consists of engine, speed sensor and throttle. The electronic throttle control system can accurately control the throttle opening. Remove the steel wire, use the throttle position sensor to determine the energy required by the engine, and then the on-board computer controls the opening of the electronic throttle to control the air intake.