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⚡ Diagnose ignition issues like a pro—don’t let your engine misfire in silence!
The Lisle 20580 In Line Spark Tester with Coil On Plug Wire is a precision diagnostic tool designed for quick and accurate ignition system troubleshooting. Featuring a dual-ended wire with straight and 90-degree boots plus a 7-inch extension for hard-to-reach coil-on-plug setups, it delivers real-time spark visualization across all ignition systems. Lightweight, hand-powered, and backed by a limited lifetime warranty, it’s a must-have for professional-grade engine maintenance.


| ASIN | B09NMHFGXD |
| Best Sellers Rank | #2,558 in Automotive ( See Top 100 in Automotive ) #6 in Spark Plug & Ignition Tools |
| Brand | Lisle |
| Brand Name | Lisle |
| Color | for all Ignition Systems |
| Compatible Devices | Internal combustion engines with spark plugs and ignition systems |
| Customer Reviews | 4.6 out of 5 stars 643 Reviews |
| Global Trade Identification Number | 00083045205807 |
| Included Components | tster and wires |
| Item Dimensions | 7 x 14 x 2 inches |
| Item Type Name | Tester |
| Item Weight | 8 ounces |
| Item dimensions L x W x H | 7 x 14 x 2 inches |
| Manufacturer | LISLE |
| Model | 20580 |
| Number of Items | 1 |
| Part Number | 20580 |
| Power Source | Hand Powered |
| Style | InLine Spark Tester w/ Coil On Plug Wire |
| Style Name | InLine Spark Tester w/ Coil On Plug Wire |
| UPC | 083045205807 |
| Unit Count | 1 Count |
| Warranty Description | Limited Lifetime |
J**L
Great quality.
Great product and much better than the orange product that is similar to this one that is sold on Amazon. Well worth the money. Great quality.
J**J
Great item
Good quality, easy to work with, works great, bright light, like the longer boot for coil packs. Struggled with the shorter one in the beginning. I have the dreaded 5.4l 3 valve v8 F-150 and sparkplugs were just to start with....
M**4
Works great
Worked awesome on my 98 Cobra. Reaches all the way down the spark plug tube.
R**N
Good tool
Handy device that takes guess work out of sparking issues for engines.It is made in the usa.
M**N
Only connects to barrel style spark plugs tips
works great but buyer beware it does not work with stud style spark plug tips It only seats on the barrel style connector on the spark plug
R**.
as described
quick shipping great price and awesome quality
R**C
Versatile
This tester will reach deep if your spark plugs are situated between your car's intake and exhaust cams, like my Porsche 944 S2. The light seems plenty bright.
C**T
Works
Works!
J**N
Goood Quailty
Great product and long plug to go down in the cylinder to connect to the spark plug and great to put onto the coils, long enough to see from cyclinder 1 and 8
J**E
Fácil de usar
Producto de fácil uso y buena calidad y muy buen precio.
R**Y
Great tester!!!
Amazing price; works well. Great way of checking coils and plugs on the quick and save some money on diagnosis. Usually plugs are fairly cheap to fix if you do them at home and these definitely help keeping minor fixes cheap.
E**S
Excelente herramienta
Justo para el trabajo
J**P
Spark tester
Good tester for deep set sparkplugs
Trustpilot
4 days ago
2 weeks ago