Providing an immediate visual check of spark energy, this inline spark tester connects between the spark plug and wire to diagnose ignition issues while the engine is running. It utilizes a double-ended wire with both a straight and 90-degree boot to fit various engine configurations. For recessed components, an additional 7" (17.8 cm) extension plug wire facilitates testing on hard-to-reach coil-on-plug systems.

Providing an immediate visual check of spark energy, this inline spark tester connects between the spark plug and wire to diagnose ignition issues while the engine is running. It utilizes a double-ended wire with both a straight and 90-degree boot to fit various engine configurations. For recessed components, an additional 7" (17.8 cm) extension plug wire facilitates testing on hard-to-reach coil-on-plug systems.