How to Test the Condition of an Ignition Coil?

[Hattie]

Checking whether an ignition coil is in good condition can be done on the machine. The specific steps are as follows: 1. Turn on the ignition switch, and after confirming that the low-voltage circuit is normal, pull out the high-voltage wire from the center of the distributor cap, keeping it 3-5mm away from the cylinder block. Use a screwdriver to toggle the distributor contacts, continuously opening and closing them. If a blue-white spark jumps between the high-voltage wire and the cylinder block with a crisp sound, it indicates that the ignition coil is functioning well. 2. If there is no spark and the high-voltage wire is confirmed to be normal, it means the ignition coil has failed. 3. During engine operation, the condition of the ignition coil can also be judged by temperature. A slightly warm coil is good, while a scalding hot one is faulty or damaged. Additionally, installing the suspected ignition coil on an engine with a fully functional ignition system for a spark test can help determine its condition.