What are the reasons for feeling insufficient power after driving a car for a long time?

[ZoeDella]

There may be several reasons for feeling insufficient power after driving a car for a long time: 1. Clogged fuel tank vent hole: The fuel tank switch, fuel filter, or the fuel pipe between the fuel tank and the carburetor are partially blocked, unable to meet the required fuel supply, resulting in a lean mixture and weak engine performance. Due to long-term use of the air filter without timely cleaning, clogging and insufficient air volume will cause an excessively rich combustible mixture, leading to a decrease in engine power. 2. Incorrect ignition timing or premature ignition: This causes premature combustion and detonation of the combustible mixture. Due to faults in the ignition system, the spark plug may misfire or produce weak sparks. 3. Cylinder compression pressure: Severe wear of the piston, piston rings, or cylinder increases the clearance between them, reducing sealing performance, which leads to cylinder head leakage and lowers cylinder compression pressure. Poor sealing of the crankcase causes air leakage, reducing suction power.