Tool Aid 23970 In-Line Spark Checker Kit for Recessed Plug
Provides information not available with OBD II code reading devices - pinpoints if there is a spark plug, plug wire, mechanical, fuel injection or electrical problem. Shows a duplicate view of the ignition spark so technician can visually check condition of ignition system at each cylinder. Use for testing newer vehicles with recessed spark plugs and conventional and coil-on plug ignition systems.