Toledo Adjustable Spark Plug Tester – Flexible Lead

The Toledo Adjustable Spark Plug Tester (Part Number 302167) is an essential diagnostic instrument for any automotive technician or enthusiast troubleshooting ignition issues. Designed to safely and accurately test for non-start conditions, this tool allows you to visually inspect spark strength without removing the spark plugs from the engine. By simulating the compression load a spark plug experiences during operation, it provides a realistic assessment of ignition system performance, ensuring that weak or inconsistent sparks are identified quickly.

This model features a flexible lead for easy access to recessed or hard-to-reach spark plugs, making it compatible with a wide variety of vehicle configurations. The unit is fully adjustable, allowing the user to increase the spark gap by turning the tester screw counter-clockwise to gauge voltage potential. It includes clear markings for standard ignition (indicated by ‘S’) and electronic ignition systems (indicated by ‘E’ at 10mm), along with graduated voltage markings from 2kV to 4kV. Compact and reliable, the Toledo 302167 eliminates the guesswork from ignition diagnostics, saving time and ensuring precise repair work.