Spark plugs are part of the same troubleshooting path as EGR checks and ignition-coil diagnosis, so this page helps complete the sequence.
What stands out
When an engine runs poorly, one of the easiest mistakes is mixing up different causes. A spark plug page belongs here because it helps separate ignition issues from faults that may look like EGR or coil problems.
What to inspect
- General electrode wear
- Signs of uneven combustion
- Maintenance interval and overall condition
- Compatibility with the engine and the coil pack
Editorial role
Together with EGR and ignition coil, this page helps turn basic maintenance into a clear troubleshooting path for common real-world faults.