For troubleshooting ignition systems on vehicles with recessed spark plugs or coil-on plug setups, this in-line spark checker kit provides a visual duplicate of the ignition spark at each cylinder. The flashing bulb indicates the frequency and intensity of the spark to pinpoint specific plug, wire, or fuel delivery problems that OBD II code readers cannot detect. To accommodate various configurations, the kit includes a coil tester, a battery clip adapter for grounding, and a female-to-female adapter for conventional ignition systems.

For troubleshooting ignition systems on vehicles with recessed spark plugs or coil-on plug setups, this in-line spark checker kit provides a visual duplicate of the ignition spark at each cylinder. The flashing bulb indicates the frequency and intensity of the spark to pinpoint specific plug, wire, or fuel delivery problems that OBD II code readers cannot detect. To accommodate various configurations, the kit includes a coil tester, a battery clip adapter for grounding, and a female-to-female adapter for conventional ignition systems.