How can you tell if a fuel injector is clogged?

A fuel injector is responsible for delivering fuel into the engine's combustion chamber in precise amounts. When a fuel injector becomes clogged, it restricts the flow of fuel, which can lead to a variety of noticeable issues in engine performance. The primary symptoms of a clogged fuel injector include poor engine performance, such as rough idling, reduced power, and misfires. Misfires occur because the engine is not receiving the appropriate amount of fuel needed for optimal combustion. Therefore, a vehicle experiencing these symptoms is likely to have a clogged fuel injector.

In contrast, other options are not direct indicators of fuel injector issues. Bright warning lights can indicate a range of problems within the vehicle, but they do not specifically relate to fuel injectors. Increased engine temperature could be a sign of other issues, such as problems with the cooling system rather than directly linked to fuel injector functionality. Vibrations in the steering wheel are typically related to issues with the wheels, tires, or suspension components, rather than fuel delivery. Thus, poor engine performance and misfires stand out as the most clear signs of a clogged fuel injector.