Misfire and check engine light
A failing ignition coil usually triggers a misfire in one cylinder — felt as a rough idle, hesitation, or shaking. The check engine light comes on with a misfire code that identifies the cylinder.
Worse under load
Ignition coil problems often get worse under load — accelerating or climbing — because the demand on the ignition system is higher.
Coils and plugs go together
Spark plugs and ignition coils work as a pair. We inspect both and recommend replacing what your car actually needs — not a blanket replacement.
Want us to take a look?
These articles are general guidance — not a diagnosis of your car. Bring it to Happy Cars at 12935 W Colonial Dr, Winter Garden, FL 34787 and we'll inspect before we recommend any repair.