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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 professional-grade diagnostic tool designed to instantly visualize ignition sparks. Featuring a dual-ended wire with straight and 90-degree boots plus a 7-inch extension for hard-to-reach coil-on-plug systems, it ensures compatibility with all ignition types. Lightweight and durable, it’s backed by a limited lifetime warranty, making it an essential tool for mechanics and automotive enthusiasts aiming for precision and reliability.


| ASIN | B09NMHFGXD |
| Best Sellers Rank | #3,093 in Automotive ( See Top 100 in Automotive ) #8 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 658 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.
T**R
Good
Works good can see the spark
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....
J**H
Good price
Always quality
M**4
Works great
Worked awesome on my 98 Cobra. Reaches all the way down the spark plug tube.
.**2
Lisle makes quality tools
Lisle makes quality tools
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**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.
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.
J**E
Fácil de usar
Producto de fácil uso y buena calidad y muy buen precio.
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
E**S
Excelente herramienta
Justo para el trabajo
M**H
This is the one you want
This may be a few more $$ than many others but we'll worth it. More flexibility with multiple ways to connect for tight fitting test applications
Trustpilot
1 month ago
1 month ago