What is the most common cause of an engine misfire?

The most common cause of an engine misfire is often attributed to faulty fuel injectors. Fuel injectors play a critical role in delivering the correct amount of fuel into the engine's combustion chamber. When fuel injectors fail or become blocked, they may not supply the proper fuel mixture needed for efficient combustion. This can lead to incomplete combustion, resulting in one or more cylinders misfiring.

An engine misfire is characterized by a noticeable decrease in engine performance, rough idling, or even stalling. Addressing issues with fuel injectors can significantly improve engine function, restoring power and efficiency.

While electrical problems can also lead to misfires, they are less frequently the primary cause than fuel delivery issues. Low oil levels typically affect engine lubrication rather than directly causing misfires, and dirty air filters, while they can impact engine performance, do not usually lead to misfires in the same direct manner as faulty fuel injectors.