FEATURE HIGHLIGHTS
Core Capabilities
The OBDResource ST100 Pro Spark Plug Tester is a professional ignition system diagnostic tool designed to quickly and accurately test the firing performance of spark plugs under simulated operating conditions. Ideal for automotive technicians, engine rebuilders, maintenance shops, and advanced DIY enthusiasts, this spark tester helps identify weak spark, no spark, misfire and faulty ignition components without running the engine.
Supporting wide voltage input (100–240V), the ST100 Pro is compatible with workshop power supplies worldwide. The tester is capable of dual plug simultaneous testing, allowing two spark plugs to be checked at the same time for efficient diagnosis and direct comparison. High-energy spark output replicates real ignition conditions, while built-in indicator lights provide clear visual feedback for fast and intuitive testing.
Compact, durable, and easy to use, the ST100 Pro delivers reliable spark plug performance analysis — helping technicians make confident decisions before reinstalling or replacing spark plugs.
Key Features
Wide Voltage Input (100–240V)
Compatible with global workshop power systems, making it ideal for professional garages, service centers, and field use.
Dual Spark Plug Testing
Test two spark plugs at once for side-by-side comparison and faster diagnostics.
High-Energy Spark Output
Simulates real engine ignition spark energy for accurate assessment of plug performance.
Visual Indicator Lights
Integrated power and spark activity lights provide intuitive, real-time visual feedback.
Easy & Safe Operation
Quick plug insertion and one-switch activation make this tester simple for both professionals and DIY mechanics to use.
Durable Professional Construction
Rugged housing and reliable internal electronics are built for frequent workshop use.
Typical Applications
- Diagnose weak spark or no spark conditions
- Compare spark plug performance before installation
- Verify spark plug condition after cleaning or maintenance
- Support ignition system troubleshooting
- Workshop and field diagnostic use
Technical Specifications
Product Name: OBDResource ST100 Pro Spark Plug Tester
Voltage Input: 100–240V AC
Testing Capacity: Dual spark plug simultaneous test
Output: High-energy spark simulation
Indicators: Power and spark status lights
Application: Automotive gasoline engine spark plug testing
PRODUCT OWNERSHIP
Resources & Support
Find product documentation, available updates and technical help.
If you are suspicious of a spark plug not working and don't want to use the conventional method of testing it, use this! It works great, has a range of speeds to choose from, and is lightweight and compact! 10/10!
This is a pretty basic spark plug tester that just works. The dial for the interval is very nice touch, allowing you to test the plugs are different frequencies. It's a very handy tool to have for the automotive DIY'ers.One thing that I wish it had was a cover so that you don't accidentally touch it when testing the plugs, as it can be quite dangerous.
Gute Hilfe
Product is just as described in the information works great love it
Usefull tool for check spark plugs.
Quality made for the price I paid well described in the description easy to use
I am very satisfied. Would definitely recommend.
Funktioniert
Alles bestens. So konnte ich meine Zündkerzen testen um sicher zu sein, dass ich keine defekten gebrauchten Kerzen auf Lager lege.
I recently purchased a spark plug tester with dual holes and adjustable working frequency, and I have been thoroughly impressed with its performance. This tool has proven to be an essential addition to my automotive toolkit.The dual holes feature allows me to test both standard and long-reach spark plugs with ease, making it incredibly versatile for various engine types. The adjustable working frequency is a game-changer, as it allows me to fine-tune the testing process for optimal results. Whether I'm working on an older vehicle or a modern one, this feature ensures accurate and reliable testing.The build quality of the spark plug tester is excellent, and it feels robust and durable in hand. The controls are intuitive and easy to use, which is crucial when you're working in a garage or under the hood of a car.Overall, I highly recommend this spark plug tester to both DIY enthusiasts and professional mechanics. Its dual-hole design and adjustable working frequency make it a versatile and dependable tool for diagnosing engine issues and ensuring efficient combustion. It has quickly become an indispensable part of my automotive maintenance routine.
It's okay for the price but made cheaply but it's the job
