What is the typical primary resistance of an ignition coil?

The typical primary resistance of an ignition coil generally falls within the range of 150 to 1,500 ohms. This resistance is important for controlling the amount of current that flows through the ignition coil's primary winding when the ignition system is energized.

A resistance value that is "less than 3 ohms" is not accurate, as it would suggest an extremely low resistance that is not characteristic of ignition coils. Resistance values in ignition coils are designed to ensure effective operation, and they typically range from a few hundred to a couple of thousand ohms to prevent overheating and to work efficiently with the vehicle's ignition system.

Understanding the correct resistance range is crucial for diagnosing ignition coil issues, as too high or too low resistance can indicate a fault in the coil or related components. Thus, recognizing that the generally accepted primary resistance specifications range from 150 to 1,500 ohms is essential for proper maintenance and troubleshooting of ignition systems.