Auto Ignition System Detector – Spark Voltage & Coil Tester

Find Ignition Problems Faster—Cylinder by Cylinder Engine running rough, misfiring, or losing power? This handheld ignition detector lets you check the ignition signal and compare spark-voltage readings across cylinders—helping you quickly identify the cylinder that behaves differently. No need to directly contact high-voltage ignition components. Check. Compare. Find the abnormal cylinder. Why Choose This Ignition System Detector? Compare cylinders quickly to locate abnormal ignition behavior Detect ignition signals through the inductive probe View spark-voltage reference readings directly on the digital display Non-contact testing near the ignition coil Designed for four-stroke COP / independent ignition systems Rechargeable 400mAh battery with USB-C charging Spot the Cylinder That Doesn't Match On a properly operating engine, cylinders should normally produce similar spark-voltage reference readings. Test each ignition coil one by one and compare the displayed values. If one cylinder is significantly different from the others, you have a clear starting point for further diagnosis. Diagnose Ignition Problems With Less Guesswork A rough-running engine can have several possible causes. By comparing ignition behavior across cylinders, the detector can help point you toward possible issues involving: Ignition coils Spark plugs Ignition circuit problems Incorrect spark plug gaps Cylinder-related ignition abnormalities It helps you narrow down the problem before replacing parts blindly. Detect Both Ignition Signal & Spark Voltage The detector provides two useful checks: Ignition signal detection The indicator flashes in response to the detected ignition signal. Spark-voltage comparison The digital screen displays a spark-voltage reference value that can be compared between cylinders. This gives you more information than simply checking whether a coil is firing. Non-Contact Inductive Testing Place the probe near the top of the ignition coil and adjust the sensitivity. There is no need to connect the probe directly to the high-voltage ignition terminal. Important: The inductive probe must not directly touch high-voltage ignition components. Built for Comparative Diagnosis The displayed spark-voltage value should be treated as a diagnostic reference for comparing cylinders, not as a laboratory-calibrated absolute voltage measurement. That is also its main advantage: you're looking for the cylinder that behaves differently. For example: Significantly lower than other cylinders may indicate: Ignition coil insulation leakage or internal fault Spark plug insulation leakage Small spark plug gap Carbon/oil contamination Low cylinder pressure Ignition timing problems Coil/spark plug mismatch Significantly higher than other cylinders may indicate: Excessive spark plug electrode gap Poor coil-to-spark-plug contact Coil/spark plug mismatch These readings help guide diagnosis; additional testing may still be required to confirm the exact cause. Perfect For Automotive technicians Repair shops Experienced DIY mechanics Engine misfire troubleshooting Ignition coil comparison Spark plug troubleshooting Rough-running engine diagnosis Preventive ignition-system checks Four-stroke COP ignition systems How to Use 1. Start the Engine Run the engine normally and locate the ignition coils. 2. Position the Probe Place the probe head near the top of the ignition coil. Do not allow the inductive probe to directly touch high-voltage ignition parts. 3. Adjust Signal Sensitivity Turn the ignition-signal adjustment until the indicator flashes consistently with the ignition activity. Adjust the probe distance to reduce interference from neighboring ignition coils. 4. Adjust the Spark Reading Use the spark-voltage adjustment control until a stable reference reading is displayed. The supplier recommends adjusting the displayed value into approximately the 10–30kV range during testing. 5. Compare Every Cylinder Repeat the same procedure on each cylinder. Under normal conditions, readings from cylinders on the same engine should generally be similar. A significantly different cylinder may require further inspection. Specifications Specification Details Product Type Automotive Ignition System Detector Main Functions Ignition signal detection + spark-voltage comparison Detection Method Inductive / non-contact probe Spark Voltage Display Range 0–50kV Recommended Test Display Range Approx. 10–30kV Ignition Compatibility Four-stroke independent / COP ignition systems Vehicle System Compatibility 12V & 24V ignition systems Display Digital numerical display Battery Built-in rechargeable lithium battery Battery Capacity 400mAh Charging Voltage 5V Charging Port USB Type-C Controls Ignition signal adjustment + spark-voltage adjustment Charging Indicator On while charging; turns off when fully charged What's Included 1 × Auto ignition system detector 1 × Integrated inductive probe 1 × USB Type-C charging cable 1 × User manual USB charger/power adapter is not included. Find the Problem Cylinder Before Replacing Parts When one cylinder isn't firing like the others, guessing can waste both time and money. Compare the ignition signal and spark-voltage reference readings across cylinders and quickly narrow your diagnosis to the area that needs attention.