Testing spark plug coils with a multimeter is a crucial step in diagnosing ignition system issues. A spark plug coil is responsible for generating the high voltage necessary to create a spark at the spark plug, igniting the air-fuel mixture in the engine’s cylinders. A faulty coil can lead to misfires, reduced engine power, and increased emissions.
Using a multimeter to test a spark plug coil is a relatively simple process that can be performed in a few minutes. By following the steps outlined below, you can quickly and easily determine if the coil is functioning properly.