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Description
DUOYI Automobile Dual-hole Spark Plug Diagnostic Tester, DUOYI EU Plug1. Power adapter: Input 100 240V AC Output 12V 1A DC 2. Purpose: test spark plug performance and ignition strength 3. Application range: 12V gasoline engine automotive spark plugs 4. The dual hole automotive spark plug tester has two test holes, which can test two spark plugs at the same time. If you suspect that any spark plug is not working properly, you can do a comparative test to make an accurate judgment 5. Test principle: In the automotive
1. Power adapter: Input 100-240V AC / Output 12V 1A DC
2. Purpose: test spark plug performance and ignition strength
3. Application range: 12V gasoline engine automotive spark plugs
4. The dual-hole automotive spark plug tester has two test holes, which can test two spark plugs at the same time. If you suspect that any spark plug is not working properly, you can do a comparative test to make an accurate judgment
5. Test principle: In the automotive ignition system, the high-voltage ignition coil generates a high voltage (more than 10,000 volts), and the spark plug leads it to form a high-voltage ignition coil into the cylinder engine. The spark between the spark plug electrodes ignites the mixture. The detector can distinguish good spark plugs from bad spark plugs according to the intensity of the spark
6. Turn the key switch clockwise to turn on the tester, and the indicator light is green
7. Close the protective cover, insert the adapter into the side socket, and connect the tester to the power supply to turn it on
8. Turn the switch clockwise to adjust the operating frequency between 1000rpm and 6000rpm/min. The higher the frequency setting, the stronger the spark.
9. Dimensions: 145x85x60mm
10. Weight: 354g
Instructions for use of the automotive spark plug tester:
1. Turn off the power before placing the spark plug
2. The spark plug tester is a high-voltage detector. Do not touch the spark plug with your hands during operation to avoid danger
Packing list:
- Spark plug tester x 1
- Power adapter x 1
- User manual (English) x 1
Specification:
| Package Weight |
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
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Product Reviews
★★★★★ 5
Muy buena calidad
Color: J-Class - Black
Excelente calidad
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Reviewed in the United States on June 10, 2026
★★★★★ 4
Estilo y funcionalidad en un solo accesorio
Color: J-Class - Black
Esta es la opción ideal para el hombre moderno que busca funcionalidad, elegancia y sofisticación en un accesorio. Hecha con cuero de la mejor calidad, perfecta para ocasiones formales o de uso diario.
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Reviewed in the United States on December 8, 2025
★★★★★ 5
Excelente producto
Color: Pop Color - Navy/Red
La billetera es muy linda y su material suave.
El diseño es lindo
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Very comfortable very functional and well thought out
Color: Logo Ribbon - Brown
This wallet is so well made, fits all of my cards and i.d. perfectly without having to fight to get them back out, has nice cushion as well if you keep in back pocket, never even know its there until you need to pull it out, absolutely love this wallet
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Reviewed in the United States on February 20, 2026
★★★★★ 5
Nautica nails it again!
Color: Cobalt Blue
Was always a fan of Nautica trusting all its products to be of superior quality, fit and finish and this one does not disappoint. Premium build quality! Looks amazing and still compact after fitting in many cards inside. Been using since a couple of months now and it's definitely been a satisfactory purchase.
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Reviewed in the United States on May 5, 2026