What are the possible causes of engine acceleration weakness?

[VonRonan]

Possible causes of engine acceleration weakness are as follows: Engine intake pipe leakage: The intake system contains many intake manifolds or various valves. Any leakage in these components can allow unwanted gases to enter, resulting in either excessively high or low concentrations of the air-fuel mixture in the intake manifold. This ultimately leads to symptoms such as intermittent engine shaking or weakness during idling. Fuel system blockage or malfunction: Due to a blocked fuel tank vent, clogged fuel tank switch, fuel filter, or fuel lines between the tank and carburetor, the engine may not receive the required amount of fuel during idling. This causes the air-fuel mixture to become lean, resulting in weakened engine power output and idle shaking.