Adjustable gap permits you to judge the strength of the coil
Allows you to visually see the spark jump across the tips
One of the best ways to check your ignition coil output
Just plug in the tester between the spark plug and plug wire, screw assembly quickly and easily adjusts the gap plug. The clamp is securely fastened to the ground, designed to prevent high flashes of energy, bending directly onto any ground.
Normal Spark is purple and blue, and the ignition is permanent, anomalous sparks color oblique yellow, oblique red or indirect interruption.
It can quickly and easily diagnose whether the car ignition system is working properly. Avoid fire, ignition coil burned out and so on.
We offer a safe and reliable way to diagnose faults, convenient, economical and economical.
Made of high quality material, durable for long term use.