Excess smoke from the engine is most often an indicator of engine trouble forming. The various smoke colours can help to troubleshoot more specifically what the problem could be.
White smoke can mean the engine timing is off or the engine compression is weak.
Blue smoke can mean worn cylinders, piston rings and valves.
Black smoke can be an indicator of dirty air filters, bad injectors, a turbo problem or a problem in a cylinder head (insufficient fuel to the cylinder).