Is your electronic fuel injected vehicle running a little rough? Checking the fuel injectors for proper function and signal can be time consuming without the proper tools. The Powerbuilt Deluxe Fuel Injection Test (Noid) Light Kit is perfect for testing vehicle electronic fuel injectors and Idle Air Control Valve for proper on-off signal function. The Test Kit included 8 fuel injection test (Noid) lights and 2 Idle Air Control Valve lights. It’s easy and efficient to use. Slip the lights onto the vehicle injectors and look for the light to flash on an off with each electrical signal showing proper function. If the injector or IAC valve is too deep in the engine bay for a clear view of the light, attach the included 48 inch fiber optic cable for easier viewing. Kit comes in a blow molded organizing case with professionally written instructions and usage photos.