What's the reason for lack of acceleration and jerking sensation?

[LeCarter]

First, check if the wrong fuel was used, as using gasoline with a lower octane rating may cause lack of acceleration, resulting in reduced engine power and increased fuel consumption. Then proceed to inspect and troubleshoot the engine oil system, engine intake system, and ignition system. Additional reference materials are as follows: 1. Engine oil system: Engine oil ensures sufficient lubrication, reduces resonance, and enhances the smoothness of engine operation. If the engine oil is insufficient for a long time, mild cases may result in insufficient power and increased fuel consumption; severe cases may lead to piston knocking on the throttle, causing mechanical damage to related connecting parts. Additionally, fuel pump failure or a clogged fuel filter can also reduce engine power. 2. Engine intake system: Besides fuel, the engine also requires air. If components such as the air filter or throttle valve are clogged or malfunctioning, leading to insufficient air intake, it can also cause the car to accelerate poorly and slowly, accompanied by a jerking sensation. 3. Ignition system: If the spark plugs misfire, leak, or fail to atomize properly, it can also affect the engine's acceleration.