When considering the functionality and performance of your vehicle, a pertinent question arises: should I replace ignition coils with spark plugs? This inquiry prompts a deeper examination of the underlying mechanics of how ignition systems operate. Could the ignition coils be adversely affecting the efficiency of the spark plugs, leading to suboptimal engine performance? Alternatively, is it feasible that replacing only the spark plugs could suffice in restoring the engine to its optimal state without the need for addressing the ignition coils? What are the indications that one component may be failing in comparison to the other, and how can one discern whether both components should be replaced simultaneously? Furthermore, does the age and wear of your vehicle play a critical role in determining whether an investment in both parts is justified? Through this exploration, one can better ascertain the necessity and interdependence of these vital components within the ignition system.