Blue Smoke vs. Black Smoke | Car Trouble
When a vehicle is emitting blue or black smoke, chances are that it is not properly tuned or maintained. When a vehicle is poorly tuned or maintained, the equipment on the vehicle designed to control the level of pollutant emissions may not function properly. Smoke from petrol engine vehicles is mainly due to excessive wear. Diesel vehicles may emit smoke from poor injector maintenance, excessive fuel delivery rates or poor driving technique.
The following problems may be the cause of smoke from a vehicle.