What is a consequence of wear in an ignition system?

Wear in an ignition system can lead to running issues primarily due to the deterioration of components such as spark plugs, coils, and ignition wires. As these parts experience wear over time, their ability to generate a reliable and effective spark diminishes. This can result in misfires, poor engine starting, and irregular idling, ultimately causing performance to suffer. The ignition system is crucial for ensuring that fuel-air mixtures ignite at the correct time, and any wear that impacts this timing or the quality of the spark can directly lead to a range of running issues that affect engine smoothness and reliability.

In contrast, improved performance, increased fuel efficiency, and higher RPM capability are typically associated with a well-maintained ignition system; therefore, wear would detract from these outcomes rather than enhance them.