What component is not generally associated with an electric ignition system?

In an electric ignition system, the primary components include a spark plug, a battery, and a step-up transformer, all of which play crucial roles in creating the spark necessary for igniting the fuel-air mixture in an engine. The spark plug is responsible for generating the spark, the battery supplies the required electrical power, and the step-up transformer increases the voltage to ensure a strong spark.

A fuel injector, however, is not typically part of an electric ignition system. Instead, the fuel injector is more closely associated with fuel delivery systems in fuel-injected engines, where it is responsible for spraying fuel directly into the combustion chamber or intake manifold. While both systems—ignition and fuel delivery—are essential for engine operation, they serve different functions. Thus, the fuel injector does not belong to the electric ignition system, making it the correct response to the question regarding components not generally associated with that system.