Performance Tool Inline Ignition Spark Tester
Easily connects between the spark plug and spark plug wire
With the engine running, the tool flashes a mirror image of ignition spark
Quick and easy test helps check the condition of the ignition system at each cylinder
Troubleshoot dirty spark plug connections, defective points, bad cables or connections, and more
Shows voltage to plug, a stronger voltage will create a brighter light
5″ Spark plug connection, overall length 8-1/2″