OTC 6589 Electronic Ignition Spark Tester white
by OTC
- Simple, high quality tool designed to test high energy electronic ignition (HEI) systems
- Simply attach plug wire to end then use built in clip to attach to ground
- Tester will give you true spark performance results, helping you identify ignition anomalies that simply removing a plug and grounding it won't reveal
- For use on vehicles and power equipment equipped with a high energy ignition system
Our Experience
I've tried a bunch of these ignition spark testers, but this OTC 6589 really hit the mark for me. The simplicity is what sold it - just attach your plug wire, clip it to ground, and you're good to go. It's like they designed it with actual mechanics in mind, not just engineers who've never seen a greasy engine bay.
One thing I loved was how it gave me an honest spark performance readout. I was working on a '98 Civic that had been acting up, and this tester showed me it wasn't just the plug causing issues - there was something funky going on with the ignition system too. That alone saved me hours of trial and error.
My only critique? The clip could be a bit sturdier.
Customer Reviews
Excellent tool, I don't even consider using a screwdriver or additional spark plug to test coils, a real test anymore. Coils sometimes like to get weak over time, and cause occasional misfires. You can't really test if it's 20% weaker than its supposed to be. It will still appear to be a good spark. Unless you use the OTC spark tester, it requires the coil to output a much higher voltage. Similar to under high load conditions. Sounds like I'm trying to sell this tool, but it saved me a lot of ti
I’m not a professional mechanic, but I pretend to be one.We’ve all done it before—using jumper cables or vice grips or any other means of grounding out a sparkplug to check and see if it has spark. Well, that’s basically what this thing is.I’ve only used it once (on a ’96 Toyota with coil on plugs) and it worked like a champ. I don’t know if the shape of the porcelain and the gap it has to jump affects how loud the “pop” of the spark is, but you don’t even have to see the spark to know it’s wo
I own an automotive repair facility that employs 3 other technicians and I have been using spark testers for over 30 years and I have tried them all:1. The plastic encapsulated ones (not reliable or accurate)2. The "In Line" type - NEVER - NEVER USE THESE!!It only takes around 10,000 volts to "light" those up - but todays cars need upwards of 50,000 volts so you'll have a "light" but not enough volts to fire the spark plug.3. I have had 2 OTC 6589's in my box for 20 years - they ALWAYS work A
This tester is nice. It doesn't break the bank and if you get spark you know everything is good. It takes the guess work out of having to measure the spark etc from other testers. If you don't get spark and you have it properly grounded you know something is wrong. I read a few reviews before purchasing this at least one of which complained about the spring mechanism that clamps the tester to said ground. Truth be told on my fist use YES it did come apart because the spring popped out but it is
His quality tool works amazingly for hei and dis systems and is a necessity
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