The most common way of checking your ignition coil is to use an in-line spark tester. First you will have to remove the spark plug boot. Plug the spark tester into the boot, and connect the spark tester clip to a good grounding spot on the engine.
How do you diagnose a bad spark plug coil?
If your engine misfires or stalls when you are idle or when you stop suddenly or accelerate, there could be a problem with your ignition coil. A misfire — which can sound like a coughing or sputtering noise or feel like a jerk or strong vibration — means that one of the engine's cylinders is not firing correctly.
How do you check a spark plug coil with a multimeter?
Can you test a coil with a multimeter?
Test the Windings with a Multimeter
Each ignition coil consists of two separate coils wrapped around each other: the primary winding and the secondary winding. Connect the multimeter's positive and negative leads to the corresponding terminals as instructed for testing Primary and Secondary windings.