Updated August 21, 2018 by Quincy Miller

The 10 Best Spark Testers

video play icon
Best High-End
Best Mid-Range
Best Inexpensive

We spent 26 hours on research, videography, and editing, to review the top options for this wiki. If you're afraid your spark plugs are on their way out — and you don't want to risk getting zapped while using a screwdriver to check them — then one of these inline testers is just what you need. They can help you identify a multitude of ignition problems, saving you the hassle of having to take your car into the shop (not to mention hundreds of dollars' worth of diagnostics). When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best spark tester on Amazon.

10. Oregon 42-087

9. GearWrench 2756D

8. Performance Tool W84600

7. Tool Aid 36350

6. Thexton THE404

5. Lisle 20700

4. OTC 6589

3. Tool Aid 23970

2. Ram-Pro Diagnostic Detector

1. Lisle 20610

Quincy Miller
Last updated on August 21, 2018 by Quincy Miller

After getting his bachelor’s from the University of Texas, Quincy Miller moved out to Los Angeles, where he soon found work as a copywriter and researcher, specializing in health and wellness topics for a major online media brand. Quincy is also knowledgeable about home improvement, as he’s had extensive experience with everything from insulation to power tools to emergency room trips, sometimes in that order. Sharing a home with three dogs and a couple of cats has forced Quincy to learn as much as he can about pet supplies, animal nutrition and, most importantly, the best ways to tackle the mountains of fur that accumulate in every corner of your home.

Thanks for reading the fine print. About the Wiki: We don't accept sponsorships, free goods, samples, promotional products, or other benefits from any of the product brands featured on this page, except in cases where those brands are manufactured by the retailer to which we are linking. For our full ranking methodology, please read about us, linked below. The Wiki is a participant in associate programs from Amazon, Walmart, Ebay, Target, and others, and may earn advertising fees when you use our links to these websites. These fees will not increase your purchase price, which will be the same as any direct visitor to the merchant’s website. If you believe that your product should be included in this review, you may contact us, but we cannot guarantee a response, even if you send us flowers.