Spark plug and coil testers quickly check the operation of the ignition system in gasoline engines: spark, continuity, voltage under load and coil response. The range includes visual spark testers, gap testers, inductive clamps and 12V devices for dynamic vehicle checks. Accurate diagnosis in a few seconds, without unnecessary disassembly, ideal for workshops and garages. Choose the right tester for the make and type of engine for accurate results and effective repairs.