BLACK SMOKE

Black smoke is mainly attributed to over fuelling :

• The injector pump is set too rich, there is an excessive amount of diesel being sprayed into the cylinders.
• The turbo charger is not supplying sufficient pressure (air) into the engine.
• The injectors may be worn, posibly linke with some white smoke.

BLUE SMOKE

Blue smoke is only caused by oil in the wrong places:

• Blue smoke while idling and low revs, or a puff if smoke when accelarating from idle means the valve stem seals are shot.
• Blue smoke while driving shown the rings are worn, usually harder to detect than in petrols but always linked to higher oil consumption.
• Blue smoke on decelleration on long slow downhills, shows valve stem seals are shot.

WHITE SMOKE

White smoke is a result of incorrect injection pump timing, foreign fluids and air :

• Constant thin white smoke on idle, puffing when revving the engine.
• Water in the fuel system - Maybe from a bad tank of fuel ? Been wading in deep water lately ?
• Air in the fuel system - a badly sealing filter, or joint or tank return blocked.

Ever experienced serious knocking and loss of power in the engine ?
Petrol in diesel is more common than the fuel agents like to admit, the tank should be drained immediately and a sample taken for analysis. Petrol causes excessive injector pump wear and damage to the injectors. The block/pistons also suffer.