Ignition coils burn out mainly due to insulation layer aging/breakdown or faulty switching transistors. Too large/small spark plug gaps overheat coils, accelerating insulation aging. Assembled coils may have shorter lifespans from poor materials or low-quality parts.

If coils burn out soon after replacement, check these:

1.Test generator power (over-generation overloads coils; faulty ones damage bulbs too).
2.Adjust/replace spark plugs (if gap is too large).
3.Use higher-octane gasoline (for poor fuel quality).
4.Adjust incorrect cylinder compression ratio.
5.Diagnose ECU (clear errors; check transmission if failed).
6.Fix unstable power voltage or replace high-tension wires (abnormal resistance).
7.Address secondary circuit short circuits or overhigh ignition controller primary current.
8.Resolve high-temperature issues or faulty high-pressure waves.
9.Try a different brand (rarely coil itself is faulty) or fix igniter integrated circuit.