AUTOOL SPT105 Car Spark Plug Tester with Adjustable Test Hole Height Dual-Hole Design RPM Simulation and Protective Cover for 12V Spark Plugs is a specialized diagnostic tool designed to test the ignition function of 12V spark plugs in automobiles. This tester helps evaluate spark plug condition without removing them from the engine, allowing efficient checks of spark plug performance and ignition quality.
This unit features an adjustable test hole height and a dual-hole design, enabling compatibility with various spark plug sizes and configurations. The RPM simulation function replicates engine running conditions, giving a more accurate assessment of spark plug operation under real driving scenarios. Additionally, the tester includes a protective cover for safe handling and durability during testing procedures.
When comparing this part to existing spark plug testers, focus on the voltage compatibility (12V), the adjustable test hole height, and the dual-hole design to match your spark plug setup. The RPM simulation is a key feature for users seeking quicker troubleshooting without external engine running.
- Adjustable test hole height for versatile fitment
- Dual-hole design supports different spark plug types
- RPM simulation for realistic spark plug testing
- Protective cover enhances safety and tool longevity
Use this tester to diagnose ignition issues by comparing spark brightness and consistency. If uncertain about fit or compatibility, consider submitting a Request a Part or contacting the sales desk for expert advice.
Not sure the code, size or specification matches? Use more Spark Plug or Request a Part with a clear photo of the old part before checkout.

