1. Detect the ignition signal, and the flashing frequency of the indicator is consistent with the spark frequency. 2. Detect the spark voltage, the spark voltage displayed on the screen is the reference value, by comparing the spark voltage of each cylinder, the cylinders with abnormal work can be found. 3. Analyze the performance and fault location of ignition system. 4. Suitable for four-stroke engine independent ignition system (COP). 5. Suitable for 12V and 24V ignition system test. Spark voltage display range 0-50KV. Operation prompt 1. induction probe can not directly touch the ignition coil high voltage part. 2. built-in lithium battery capacity: 400mAh. 3. charging voltage 5V, charging interface TYPE-C. 4. The indicator light is on when charging, and the fully charged indicator light is off. To prevent interference from adjacent ignition coils, adjust the inductive signal strength first. 1. start the engine and place the probe head near the top of the ignition coil. 2. adjust the ignition signal knob, so that the ignition signal light flashes, the probe head moves a distance and the lamp is immediately extinguished. 3. adjust the spark voltage knob, so that the screen display value between 10-30KV. 4. respectively detect all cylinders, and then compare the spark voltage values, under normal conditions, the same engine, the spark voltage should be the same or very close. 5. if a cylinder and several other cylinders spark voltage value difference is large, indicating that the cylinder is faulty. Fault analysis of automobile ignition system. The spark voltage of one cylinder is significantly lower than that of other cylinders. Possible causes: 1. ignition coil insulation leakage, turn short circuit, ignition circuit failure, etc. 2. spark plug insulation leakage, small discharge gap, carbon or oil, etc. 3. low cylinder pressure. 4. ignition timing error. 5. ignition coil or sp