Spark Plug Tester Ignition System Coil Engine In Line Auto Diagnostic Test Tools
Connect the tester between the spark plug and the plug cable simply, the screw assembly quickly and easily adjusts the spark plug. 1 Car Spark Tester. 1 ×Car Spark Plug Tester. The normal spark is purple blue and the ignition is regular, abnormal spark color slants yellow, slants red, or indirect interruption.
