The AUTOOL SPT301 Mini Spark Plug Tester is a compact and powerful diagnostic tool designed to test the functionality and ignition strength of spark plugs in real time. Ideal for both automotive professionals and DIY car enthusiasts, this portable device quickly identifies misfiring plugs and weak ignition signals—helping to ensure your vehicle runs at peak performance.

This device simulates real engine working conditions and provides a clear visual spark test, making it easy to compare multiple spark plugs simultaneously. Whether you're checking plugs before installation or diagnosing ignition issues, the AUTOOL SPT301 is an essential tool for efficient engine maintenance.

How It Works:

1. Insert the Spark Plug(s):
   Insert up to two spark plugs into the tester sockets.

2. Power On the Device:
   Plug the tester into a 12V power source (car battery or external adapter).

3. Adjust the Frequency:
   Use the adjustment knob to change the test frequency (RPM) and simulate different engine speeds.

4. Visual Inspection:
   Observe the spark through the transparent window. A strong, blue spark indicates a good plug; weak or inconsistent spark means the plug may need replacement.

5. Compare Spark Plugs:
   You can test two plugs at once for easy side-by-side comparison.

Features:

• Dual spark plug test ports for comparison

• Adjustable ignition simulation frequency (0–6000rpm)

• Compact, lightweight, and easy to carry

• Transparent test window for visual spark analysis

• Compatible with all 12V gasoline engines

• Helps detect weak, dirty, or faulty spark plugs

Specifications:

• Model: AUTOOL SPT301

• Input Voltage: DC 12V

• Ignition Frequency: 0 to 6000rpm

• Spark Viewing Window: Transparent panel

• Test Capacity: Up to 2 spark plugs at once

• Weight: Approx. 300g

• Material: High-quality ABS and metal housing