Chart 18

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Exhaust System Concerns: Visible Smoke

NOTE: Black smoke indicates a rich fuel mixture, blue smoke indicates burning oil, and white smoke indicates water in the combustion chamber.

SYSTEM/COMPONENT	REFERENCE (Engine Controls Pinpoint Test unless noted)
Base Engine	REFER to the Engine System, Diagnosis And Testing article to continue diagnosis.
Fuel Delivery System Black smoke	GO to Pinpoint Test HC.
Ignition System Black smoke	GO to Pinpoint Test JB.
Positive Crankcase Ventilation (PCV) System Blue smoke	REFER to the Engine System article for a description of the Oil Consumption Test.
Turbocharger System Blue smoke	REFER to the Fuel Charging And Controls - Turbocharger article for the Oil Consumption Test.