Which of these tools is best to check whether the PCM is pulsing an injector?

Question

Quizplus · Accepted Answer

A noid light is specifically designed to check the pulsing action of the PCM on fuel injectors. It is a simple tool that plugs into the injector harness and flashes in sync with the injector pulse. Digital and analog multimeters can be helpful in diagnosing other issues, but they do not provide the visual confirmation of injector pulse that a noid light does. A test light can be used to check for power and ground at the injector, but it does not confirm the pulsing action of the PCM.

Which of These Tools Is Best to Check Whether the PCM