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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
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Description
DUOYI DY28 Car Double Hole Spark Plug Tester, US Plug, DUOYI US Plug1. It has two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment. 2. Adjustable double hole car spark plug tester detector Ignition Plug Analyzer Diagnostic Tool 3. Usage: Test spark plug performance and ignition strength 4. Application Range: 12V Gasoline vehicles car spark plugs 5. Car Spark Plug Tester User Manual: (1). Place the Spark
1. It has two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment.2. Adjustable double hole car spark plug tester detector Ignition Plug Analyzer Diagnostic Tool
3. Usage: Test spark plug performance and ignition strength
4. Application Range: 12V Gasoline vehicles car spark plugs
5. Car Spark Plug Tester User Manual:
(1). Place the Spark Plug into tester hole 1 or 2; If you want to compare the new spark plug and old one, place new spark plug into hole 1 and the old on into hole 2
(2).Close up the protective cover , then plug in the adaptor to the side socket , connect the tester to power supply.
(3).Turn the key switch clockwise to turn on tester, indicator will light up green.
(4). Continue to turn the switch clockwise, you can adjust the working frequency between 1000rpm to 6000rpm/min, The higher the frequency is set, the stronger the spark more.
Specification:
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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
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.7 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Good 👍
Works just like oem
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Reviewed in the United States on February 26, 2026
★★★★★ 4
Price
Perfect fit at a great price
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Reviewed in the United States on March 18, 2026
★★★★★ 5
Good luck
So far so good,fit perfectly but was a real bitch to replace on a 09 Crv. Tried from underneath but couldn’t get to the rear bolt, so I had to go from the top. Poor engineering on Hondas part.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
Bueno
Cumplió su propósito
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Reviewed in the United States on April 16, 2026
★★★★★ 1
Don't waste your money.
Instead of buying one from the local auto store, thought I'd save money and get this. Bad choice. Installed it and it didn't work. Took it to the auto shop to be tested and they said it didn't work. Cheap imitation of the the real thing.
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Reviewed in the United States on November 4, 2025