Features and Benefits: * Use to test electronic fuel injection signals, idle air control circuit and spark plug circuits * Quickly diagnose "no start" and engine miss conditions in the electrical fuel injection and spark plug circuits * Analyze rough running engines * Supplied with instructions in a durable, plastic molded storage case Includes: 8 Noid Lights for checking GM PFI, FORD TBI, GEO TBI, BOSCH PFI, GM TBI, GM SCPI, BOSCH 2 and GM MULTEC 2; 2 IAC Test Lights for straight and 90° applications; and SGT23900, In-line Ignition Spark Plug Checker.