13 automatic Toyota corolla 120 * * the vibration sound when refueling hard every hour.

13 Toyota corolla automatic transmission 120 there is * * * vibration sound when hard refueling, which may be caused by cold weather and is a normal phenomenon. Suspension problems such as loose screws, mismatch between gear and speed of gearbox, and engine knocking caused by poor fuel quality may all lead to buzzing vibration when refueling.

Throttle, also known as "throttle" and "throttle". Refers to the control device that controls the engine power (thrust). On the piston aero-engine, the throttle valve controls the opening of the carburetor to control the filling amount of the cylinder, thus determining the output power of the engine. On the gas turbine engine, the throttle valve controls the metered fuel flow of the fuel regulator, thus determining the thrust generated by the engine.

When operating, increase or decrease the throttle according to the road conditions and actual needs. The selected gear should be suitable, so that the engine can run at medium speed and large throttle most of the time to save fuel. When shifting gears, the coordination of refueling, stepping on the clutch and stepping on the accelerator should be coordinated.