What can occur if the air filter in a diesel engine is clogged?

When the air filter in a diesel engine becomes clogged, it restricts the flow of air into the engine. Diesel engines require a precise mixture of air and fuel to operate efficiently. When the air supply is reduced due to a clogged air filter, the engine struggles to draw in sufficient amounts of air. This can lead to incomplete combustion of the fuel, resulting in decreased engine performance, such as reduced power output and acceleration. The engine may also encounter issues like increased exhaust emissions, rough idling, and potential long-term damage if the condition persists. Therefore, a clogged air filter directly diminishes engine performance, confirming that decreased airflow negatively impacts the engine's operation.