What is a typical symptom of a clogged fuel filter?

A typical symptom of a clogged fuel filter is poor engine performance. When the fuel filter becomes clogged, it restricts the flow of fuel to the engine, resulting in insufficient fuel supply. This can lead to various engine issues such as rough idling, stalling, hard starting, or reduced acceleration. As the engine struggles to receive the necessary amount of fuel, its overall performance diminishes, which is why poor engine performance is a clear indicator of a clogged fuel filter.

Other options, although they may seem related to fuel system issues, do not specifically identify the typical manifestation of a clogged fuel filter. Increased fuel efficiency would actually be the opposite of what occurs, as a clogged filter hampers proper fuel delivery. Higher exhaust temperature and excessive smoke emissions are also symptoms of different fuel-related problems or incomplete combustion rather than directly tied to the effects of a clogged fuel filter.