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Why does my 2010 Hyundai Accent keep backfiring? on 2010 Hyundai Accent

Check engine light kept coming on and when the vehicle is taken in, the technician cannot find a problem (typical). The vehicle has been taken to a Hyundai dealership for the same problem more than three times. The last time a coil was changed, the check engine light does not come on anymore, but the car continues to backfire.

Asked by for the 2010 Hyundai Accent
could be another coil has gone bad. seek another diag and est. have them read misfire data with scanner