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Palease! On a new motor, that's ALL you hear is the injectors! A sweet snapping sound IMO. And, 200SI, injectors operate at 12V just like every other component...save for the 5V sensors. There's no huge static electricity snap you hear. Fuel injectors are soleniods, similar to a realy, or a door lock for example. What you hear is the tiny iron or steel core moving up and down.