2PCS Spark Plug Tester, Spark Testers Tool, Adjustable Ignition Coil Tester | Coil Pack Tester, Spark Checker System, Autos Diagnostic Test Tool for Automotive, Small Engines, Lawnmowers

Love old school tools

Works good to test spark. Was able to track down my problem to incorrect firing order from someone else’s attempted repair.

I liked the option of adjusting the gap to check the strength of the spark, and the alligator clamp to get a good ground. The price was right, and the quality was good. My only complaint is that the head that goes into the ignition wire doesn't fit securely. It is removable, and it would have been nice if there were different heads to fit different applications. I will remove some from old spark plugs I have around the shop and see if they will screw onto the tester.

Spark tester; easy to use, and straightforward, adjust to see how strong the spark is, great during diagnostic procedure.

Works as advertised and the gap adjust-ability is great. I used it to test the gap ranges on used and new ignition coils to get a feel for the maximum gap the coil would cross on each plug wire. Very insightful. Would buy again and recommend.

It's good

Great way to see if that spark plug is fowling. Easy to see and use.

Spark Plug tester review - This helped me confirm that i was'nt getting any spark to the plugs. Allowed me to isolate the problem as ignition. Well made product. A must have tool.