BASIC TROUBLESHOOTING BASIC TROUBLESHOOTING This section covers basic troubleshooting of engine operation or performance malfunctions and their probable causes. In addition to operating the engine carefully and maintaining it properly make sure to correct any malfunction promptly. 108 All information subject to change without notice.
DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION Objectionable Exhaust Symptoms and Probable Causes Probable Causes Black or Gray Smoke Blue Smoke White Smoke Damaged or dirty air cleaner X — — Improper grade of fuel X — — Excessive exhaust back pressure X — — Misfiring cylinders — — X Lubricating oil not burned in cylinder (being burned in exhaust manifold or turbocharger) — X — Faulty injector timing X — — Faulty oil control rings — X — Excessive installation angle — X — Excessive oil in crankcase — X — High ambient temperature X — — Thin air (high altitude) X — — Cetane rating of fuel too low — — X Air in the fuel system — — X