6-piece Electronic Fuel Injection Noid Light Set (W89500) by Performance Tool®. Quickly and easily tests electronic fuel injection systems on: GM TBI, Bosch PFI, Ford TBI, GM PFI, Geo TBI and GM SCPI equipped vehicles. This product is designed and manufactured to help you keep the fuel system of your vehicle in mint condition. It will make fuel system maintenance easier and more convenient, saving your time and protecting you from unplanned expenses. It will help you find the problem quickly, and fix it as soon as possible.