Solve The Problem With S ' G The 58000 Universal Master Fuel Injection Pressure Test Kit with Quick Couplers from S ' G Tool Aid Corp. The company says that this one kit can be used for testing almost all domestic and imported cars and trucks. The 58000 is used for Multi-Port, Throttle Body (TBI) and Continuous injections Systems (CIS), comes with quick coupler fittings providing fast hook ups and can accurately and quickly diagnose fuel injection related problems.