White smoke is burning coolant from a head gasket failure from overheating
February, 18, 2013 AT 7:32 AM
This might be as a result of overheating or a reaction between two gases. Maybe the exhaust is giving off gases its not supposed to and as a result the gases react with the gas inside the exhaust pipe from the atmosphere. This might be what is causing the sparkles. Thus, you need to get your vehicle checked by a mechanic. It might be dangerous and lead to explosion.