What are the reasons for decreased engine power?

[ReeseAnn]

Reasons for decreased engine power are as follows: 1. Carbon deposit issues. Carbon deposits include cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, intake carbon deposits, etc. These areas are closely related to the engine's power output. When there is excessive carbon buildup inside the engine, the vehicle's ignition energy decreases, intake efficiency drops, ultimately leading to reduced engine power and symptoms like weak idling. 2. Fuel system. Using incompatible fuel octane ratings can cause decreased vehicle output power and reduced performance; or due to blocked fuel tank cap vent holes, partially clogged fuel tank switch, fuel filter, or fuel lines between the tank and carburetor, which cannot meet the required fuel supply, resulting in overly lean air-fuel mixture and weak engine acceleration. 3. Air intake. Air is one of the power sources for the engine. If the air filter is not cleaned in time after prolonged use and becomes clogged, insufficient air volume will cause an overly rich combustible mixture, leading to decreased engine power; for vehicles equipped with turbochargers, if the turbocharging device malfunctions, it can also cause reduced engine power or weakness.