Spark Plug Tester Dual Holes, Automotive Engine Ignition Coil Tester 0-6000rpm Working Frequency, Car Spark Tester Tool with Protective Cover for 12V Gasoline Vehicles

Showed working plugs right away, 2 was a little weak, but works. I used one at a time, works amazing, nice for test all the spark plugs laying around.

Yeah, does what it was made to do I guess. It sparks... not very good, but it does. I fried it by plugging it into a variable voltage power supply and cranked the voltage to high heaven because more powa = brighter sparks... nope... shows how much I know about electronics.

Works perfect. I had about 24 Spark Plugs that I had used for different Racing Applications and I wanted to test if they were still good. I tested standard and Iridium's and both worked good. Very handy to have. It won't work on shorter plugs like the kind You use in Weed Eater.

This works fine on the Automotive (longer) plugs, but if you need to check the smaller plugs for Blowers, Chainsaw, Weed Wackers, etc. Those plugs are too short to reach the connector inside the box.

After years of repairing cars and trucks with fully equipped shops. We went full time traveling and l still need to play with my tools fixing things l come across. Well I picked up a few chainsaw ordered parts including spark plugs. Well long story short I can’t get a saw to run. Ordered This unit with hopes of illuminating oversite. It Works Great couldn’t be happier. Great price. Easy to see. Adjustable range. Should have purchased Long time ago.Dont Wait Buy and B Happy. Rambling Rick 🤠🇺🇸

this is pretty cool way to test spark plugs and it works really well. it helped me narrow a car issue down and did its job great.

The media could not be loaded. First one worked well for less than a month. Then, it decided to not work above 2k rpms and be a hit or miss. So, I returned and got a second one and it didn't even work right out of the box. I tried multiple wall outlets and spark plugs. The video attached is the second one, the first one would do the same.

3 out of the 4 spark plugs in my old tractor were bad. Saved me a bunch from ordering a tune up kit, plug wires and chasing a short that doesn't exist.Easy to use. Good value!