Allan
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Registered: 05-2003
Location: Plymouth, Devon
Posts: 151
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The causes of black, blue and white smoke
The smoke from the exhaust on a diesel engine can give a good pointer to what's causing a problem, some of which are listed below:
Black smoke is generally an air to fuel imbalance - either too much fuel or not enough air:
Dirty air filter
Faulty injectors or injector pump
Faulty turbocharger or intercooler
EGR problem
White smoke is generally unburnt fuel:
Faulty engine/pump timing
Faulty injectors/pump
Fuel starvation
Water in the fuel
Engine compression low
Blue smoke is generally an indication of burning oil:
Too much oil in the engine
Faulty valves or valve stem oil seals
Engine wear - Worn piston rings or cylinders
Faulty injector/lift pump - oil mixing with fuel
Faulty tubocharger
Last edited by Allan, 16/Nov/2007, 10:14 pm
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13/Nov/2007, 6:47 pm
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