A. No, the spark plug and ignition coil are two separate parts. The ignition coil feeds the spark plug high voltage. Q. Yeah, But How Much Does It Cost To Replace an Ignition Coil?

This is how the spark plug and ignition coil work together to start the car. Since they go hand-in-hand, you should have a mechanic check on your ignition coils when they change your spark plugs ...

Though small, spark plugs play an important role in getting your vehicle started and keeping it running—so when they’re past their prime, you’re going to want to replace them.

AEM Performance Electronics brings sophisticated electronic engine control & coil-on-plug ignition to the 5.0L Ford.

For instance, Ford's Coil on Plug (CoP) system provides instant spark to the plugs for better performance and greater efficiency, however it is also a weak point for SOHC 4.6L and 5.4L V-8 engines.

While the incredible Pro-M plug-and-play standalone isn’t newly released, the new coil-on-plug ignition setup is.