How to deal with the occasional jam when stepping on the accelerator?

1, step on the accelerator steadily, without shifting gears, and occasionally get stuck, just like stepping on the accelerator and suddenly stepping on the brake, which is stuck twice a second, just like the injector suddenly stops injecting oil and then suddenly injects oil.

2. In this case, the more you step on the accelerator, the more stuck it is. It's okay to release the accelerator, but you feel that the engine resistance is getting bigger. At this time, I stepped on the clutch and wanted to slide for a while, but when I slipped, I suddenly turned off. Before the flameout, I obviously heard the battery click, and then slowly lifted the clutch at the speed of sliding and walked.

3. Two months ago, the spark plug was replaced and the throttle valve was cleaned. Last week's newly washed oil nozzle (it was not removed and washed, but washed with a hanging bottle connected with cleaning agent and combustion cleaning agent). I feel that this problem has become more serious since the nozzle was cleaned.