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All in all, we spent hundreds of hours combing through thousands of user reviews to put together a comprehensive list of the best spark plug tester on the market. We then delved into these spark plug tester further and put together detailed reviews so that you can easily pick the best spark plug tester for your needs.

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Best spark plug tester reviews

1. Lisle 20610 Inline Spark Tester

Feature

Gives a Visual Check of the Ignition System.
Quickly diagnose problems with all ignition systems. Connect the tool between the spark plug and the plug wire.
The tool is double-ended to offer a straight boot and a 90boot on one tool. With the engine running, the tool flashes a mirror image of ignition spark.
Patent: 6,714,015

2. Tool Aid 23970 in-Line Spark Checker Kit for Recessed Plug

Feature

Troubleshoot virtually all domestic and imported cars, SUVs and trucks
Flashing bulb indicates ignition or fuel delivery problems
Frequency and intensity of flash indicates whether there is an ignition system problem or fault in the fuel delivery system
Safety orange color for easy visibility

3. Tool Aid 36350 in-Line Spark Checker Kit

Feature

Package Dimensions: 30.48 H x 5.334 L x 23.114 W (centimetres)
Country of Origin : China
Package Weight: 0.862 kilograms

4. OTC 6589 Electronic Ignition Spark Tester

Feature

Simple, high quality tool designed to test high energy electronic ignition (HEI) systems
Simply attach plug wire to end then use built in clip to attach to ground
Tester will give you true spark performance results, helping you identify ignition anomalies that simply removing a plug and grounding it won't reveal
For use on vehicles and power equipment equipped with a high energy ignition system
Lifetime limited warranty

5. Oregon 42-087 In Line Spark Tester,Black

Feature

Oregon Spark Tester / 42-087
Use with engine running or just cranking

6. Performance Tool W86554 Inline Ignition Spark Tester

Feature

Easily connects between the spark plug and spark plug wire.
With the engine running, the tool flashes a mirror image of ignition spark.
Quick and easy test helps check the condition of the ignition system at each cylinder.
Troubleshoot dirty spark plug connections, defective points, bad cables or connections, and more.
Shows voltage to plug, a stronger voltage will create a brighter light.

7. Ram-Pro in-Line Spark Plug Engine Ignition Tester, 6-12 Volt Fool-Proof Pick Up Coil/Armature Diagnostic Detector Tool for Automotive, Car, Lawnmower, Small & Big Internal/External Engines

Feature

The Ram-Pro Engine Spark Tester Probe is a must have diagnostic tool for any engine with a spark plug, & can quickly and easily diagnose ignition/engine outboard motor issues or a fault in the fuel delivery system
HOW TO USE: Simply connect the tester between the spark plug and the plug wire, if spark is being sent, the tester will mirror the spark and light up - Find dirty spark plugs, defective points, bad cables or connections, etc.
DIMENSIONS: 6" boot/cable, 5" shaft/light housing; 2.2 oz. DESIGN: Nickel Plated Shaft, Double ended flexible tool offers a straight boot - Internal bulb lasts for years, but is replaceable through transparent housing
MUST HAVE: When engine won't start, gives instant answer to 'does it have spark?' - Saves time, frustration and money while also offering a safe secure way to identify spark
USE FOR: Essential Troubleshooting for All Internal & External Combustion Engines, cars, trucks, motorcycles, lawnmowers, chainsaws, trimmers, snow-blowers, generators etc. - A must have for any individual, professional mechanic garage and auto shop

8. The Best DealOriGlam Spark Plug Tester, Adjustable Ignition System Coil Tester, Coil-on Plug Ignition Spark Circuit Tester, Autos Diagnostic Test Tool

Feature

Professional Design - According to spark color and flash over distance to determine the quality of the coil.
Great Value - Can intuitively convenient to understand the operation of the ignition coil.
Better And Faster - It is the quickest way to test for no-start conditions.
Easy To Read - High visibility white lettering makes it easy to read the gap measurement.
Perfect Selection - Screw assembly adjusts spark gap quickly and easily. Avoid fire, the ignition coil burned out and so on.

9. ABN Inline Spark Plug Tester Straight Boot Ignition Test Light 2pk for Small Engine, Car, Lawn Mower, Chainsaw

Feature

QUICKLY DIAGNOSE MISFIRE ISSUES: Ignition misfires can cause your engine to stumble or lose power; Use ABN 2 Pack Spark Plug Ignition Tester for Small Engines and Vehicles to quickly and easily diagnose ignition and engine issues and defects; Troubleshoot spark plug connections, contact points, bad cables and more; Each order includes 2 Inline spark plug tester tools
WORKS WITH YOUR VEHICLES: From small engines like motorcycles and lawn mowers to cars, trucks, boat motors, this small engine spark plug tester tool works for all internal and external combustion engines that use spark plugs; This must have automotive spark tester tool will come in use in any personal or professional mechanic shops or auto garages
EASY TO USE: Easily determine which cylinder is causing issues with this spark plug test light; Simply connect the spark detector spark plug tool between the spark plug and the plug wire then start the engine; If sparks are being sent, the in line spark tester will mirror the spark by lighting up; If checking a no start condition, have a friend crank the engine so you can watch for indications of a spark
LIGHT INDICATION: Spark plug light spark checker indicates inconsistencies and sparks in a way that keeps you safe from electric currents; Intense bright white light indicates a healthy spark while jumping and dim color indicates a weak coil or plug; Remove the guesswork by using this lawn mower spark plug tester and coil pack tester; Disassemble sparkplug tester tool to access and replace the internal bulb
BUILT TO LAST: Premium materials are used to ensure maximum strength, longevity, and versatility for this inline spark tester tool; Each engine spark tester automotive spark plug checker features a 3 inch (7.6cm) nickel plated shaft and a 7 inch (17.8cm) rubber straight boot and cable; Along with the 1 inch (2.5cm) light housing, this tool measures at a full 11.3 inches (28.8cm) long to check for spark in even the hard to reach areas

10. ENA Universal In-Line Spark Plug Engine Tester compatible with Automotive Car Lawn Mower Truck Chainsaw Motorcycle 6-12 Volt Fool-Proof

Feature

Universal fitment for all engines; cars, trucks, motorcycles, lawn mowers, chainsaws, boat motors and other types 2 or 4 stroke, single or multi-cylinder gasoline engines.
Must have diagnostic tool for any household, business, mechanic, industrial and commercial spark plug use in engine.
Tested to meet and exceed OE application, quality and performance
High Quality Aftermarket Product offers straight boot and easy to use. Simply turn off engine and connect the spark plug tester between the spark plug and plug wire. If it works then the color of the light would indicate the quality of the spark.
Construct out of high quality material.

Conclusion

All above are our suggestions for spark plug tester. This might not suit you, so we prefer that you read all detail information also customer reviews to choose yours. Please also help to share your experience when using spark plug tester with us by comment in this post. Thank you!