What is one potential reason an engine may lack power?

A dirty or plugged air cleaner is a potential reason for an engine to lack power because it restricts airflow into the engine. An engine relies on a proper air-fuel mixture for optimal combustion and operation; insufficient air can lead to a rich fuel mixture, resulting in poor performance, lacking acceleration, and diminished power output. Proper airflow is crucial for the engine to operate efficiently, and when the air cleaner is obstructed, it hampers the necessary air intake, thus impacting overall engine performance. Therefore, addressing a clogged air cleaner can restore air flow, improve combustion efficiency, and consequently, enhance engine power.