Why does the car throttle surge unstably?

[MacEmmanuel]

The reasons for unstable car throttle surges include: fuel pump failure, clogged fuel filter, clogged fuel injector, or damaged spark plug. If the fuel pump pressure is insufficient, it may lead to premature aging of the fuel pump. In this case, it is recommended to replace the fuel pump promptly. A clogged or leaking fuel filter can also result in insufficient fuel supply, causing the throttle to surge when pressed. It is advisable to replace the fuel filter for testing. The car throttle, also known as the "air valve" or "throttle," refers to the control device that regulates engine power (thrust). In piston-type aircraft engines, the throttle controls the carburetor's throttle opening to adjust the cylinder's filling volume, thereby determining the engine's output power.