The primary or secondary circuit of crown ignition coil A is defective.
Hello, according to your description, it may be that the voltage provided by the ignition coil to the spark plug is insufficient. It is recommended to go to the repair shop to check whether the ignition coil is aging or leaking, and whether the spark plug gap is within the normal range. I hope my answer is great enough to ask the car master if you have any questions. 4S shop professional technician, 10 minutes to solve.