What causes my diesel engine to smoke?
What causes my diesel engine to smoke? Dirty air filter. Black smoke indicates that the fuel is not burned properly. The internal combustion process in diesel cars requires a certain mixture of fuel and air. This faulty process forms solid carbon residue, which causes a black smoke from the exhaust of the diesel engine when accelerating your car. What causes black smoke coming from a diesel engine? Black smoke is the most common smoke color coming from a diesel engine and most likely indicates something is wrong during the combustion of the diesel fuel. When diagnosing the problem the first...