Chart 18

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 ( PINPOINT TESTS unless noted)
Base Engine	REFER to the appropriate Engine System - General Information article and CARRY OUT the Inspection and Verification to continue diagnosis.
Fuel Delivery System Black smoke	GO to PINPOINT TEST HC .
Ignition System Black smoke	For vehicles equipped with a coil pack ignition system, GO to PINPOINT TEST JC . For all others, GO to PINPOINT TEST JB .
Positive Crankcase Ventilation (PCV) System Blue smoke	REFER to the appropriate Engine System - General Information article for a description of the Oil Consumption Test.
Turbocharger System Blue smoke	REFER to the appropriate Fuel Charging and Controls article - Turbocharger for the Oil Consumption Test.