What can be a consequence of running an engine with a clogged air filter?

Running an engine with a clogged air filter can lead to reduced engine power and decreased fuel efficiency. The air filter's primary role is to allow clean air to enter the engine while preventing debris and contaminants from causing damage. When the air filter becomes clogged, it restricts airflow into the engine, leading to an improper air-fuel mixture.

An inadequate supply of air can cause the engine to run rich, meaning there is an excess of fuel in relation to the amount of air. This rich condition not only reduces combustion efficiency but also leads to a loss of power, as the engine cannot perform optimally without the right balance of air and fuel. Moreover, the excess fuel may contribute to increased emissions and potentially foul the spark plugs over time. Consequently, a clogged air filter negatively impacts both the engine’s performance and fuel efficiency, making it essential to maintain and replace air filters as needed to ensure optimal engine operation.