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 -- GASOLINE MODELS unless noted)
Base Engine	REFER to the appropriate ENGINE article .
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 .
PCV System Blue smoke	REFER to the appropriate ENGINE SYSTEM - GENERAL INFORMATION article for a description of the Oil Consumption Test.