What is an Ignition Coil?

A vehicle’s ignition coils are responsible for providing the spark plugs with enough electric power to create a spark. This power is often transferred through spark plug wires, however many modern vehicles are now using coil-on-plug ignition, eliminating the need for the wires. Refer to your owner’s manual for vehicle specifications.

Because the ignition coil powers the spark plug, having a bad ignition coil could mean that a vehicle’s engine has cylinders that are not firing, causing it to lose power, misfire, sputter, and generally run poorly. This can greatly affect a vehicle’s fuel efficiency and performance.