What does an engine misfire indicate?

An engine misfire indicates a malfunction in the ignition, fuel delivery, or engine mechanics. When an engine misfires, it means that one or more cylinders are not firing correctly during the combustion process. This can happen due to various reasons, such as faulty spark plugs, ignition coils, or fuel injectors. Additionally, mechanical issues within the engine itself, such as poor compression or valve problems, can also be the culprits.

When the ignition system fails to create a spark at the right time, or if the fuel mixture is incorrect due to delivery issues, the engine cannot achieve proper combustion. This leads to a loss of power, rough idling, and increased exhaust emissions. Understanding the causes of a misfire is crucial for diagnosis and repair, as it helps identify specific components that need attention. In contrast, the other options deal with symptoms or consequences rather than the root cause of an engine misfire.