A must for new vehicles with recessed spark plugs.
.SG Tool Aid SGT23970 In-Line Spark Checker Kit for Recessed Plugs Provides information not available with OBD II code reading devices Flash can be seen in bright sunlight - saves time and money as technician does not have to swap ignition coils Clear plastic body can withstand rough use and resists automotive chemicals - shows a duplicate view of the ignition sparkThe one Ignition Spark Checker for troubleshooting virtually all domestic and imported cars SUV s and trucks.