Adjustable gap lets you test for spark under a load – good way to identify a non-working or weak coil.
Performance Tool W84600 - High Energy Ignition System Tester Tool Spark Tester
Performance Tool W84600 High Energy Ignition Tester
Performance Tool W84600 High Energy Ignition Tester New In Box Free Shipping New
Spark Plug Tester High Energy Ignition System Coil Engine Diagnostic Test Tool