Chart 22-Exhaust Smoke

DIAGNOSTIC CHART 22-EXHAUST SMOKE

System & Component(s)	Reference
BLACK SMOKE (RICH MIXTURE) Air Cleaner Element Restricted Fuel Pressure Regulator Injectors Return Fuel Line Restricted EEC Components	Perform a visual inspection. See I - SYS/COMP TESTS article. See TESTS W/CODES article.
BLUE SMOKE (BURNING OIL) PCV Valve Guides/Stems/Seals Oil Drain Passages in Heads Piston Rings (not seated, seized, etc.) Cylinder Bores (scuffed)	Check engine mechanical condition.
WHITE SMOKE (COOLANT IN COMBUSTION) Intake Manifold Gasket Leaks, Cracked, Porous Cylinder Head Gasket Leaks, Cracked, Porous Engine Block Cracked, Porous	Perform a visual inspection. Checkcooling system.