Repair manuals and support for 4-wheeled passenger and cargo vehicles.

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Diesel Motor Smoking Bad

Truck has a 2006 Duramax, it Started Running Worse And Profusely Smoking

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what color is the smoke?

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The Duarmax apparently has some injector problems that will cause the engine to idle rough and smoke heavily. Check with your dealer on the service bulletin for the engine.

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if the smoke is blue it either has a bad turbo or it is burning oil. if the smoke is black that is unburnt fuel.

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