What is one symptom of a failing fuel injector?

One of the primary symptoms of a failing fuel injector is poor engine performance or misfire. Fuel injectors are responsible for delivering the correct amount of fuel into the combustion chamber at the right time. When they malfunction, it can result in uneven fuel distribution, leading to incomplete combustion. This incomplete combustion causes the engine to misfire, which is characterized by a rough idle, reduced power output, and a noticeable decline in overall performance.

Understanding the role of fuel injectors helps to contextualize this symptom. If an injector is clogged, leaking, or otherwise compromised, the engine may not run smoothly or efficiently, directly affecting its performance. Other symptoms might include increased emissions or a decline in fuel efficiency, but the most noticeable initial signs often manifest as misfires or stalling during operation.