Why does the car suddenly fail to accelerate?

[StKatherine]

The reasons for a car's lack of acceleration are as follows: 1. Insufficient fuel: The engine does not have enough fuel, combustion efficiency decreases, and horsepower fails to meet requirements. 2. Insufficient engine air intake: In addition to 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 weakly and slowly. 3. Poor spark plug ignition: If the spark plug ignites poorly, it may result in a lack of acceleration. 4. Exhaust system malfunction: Exhaust system malfunctions mainly refer to poor exhaust flow, usually caused by a broken catalytic converter. A clogged exhaust pipe will reduce engine power. 5. Clutch malfunction: In manual transmission models, clutch slippage can cause the engine speed to increase during acceleration without a corresponding increase in vehicle speed. Dual-clutch automatic transmissions can also experience such malfunctions.