TM 10-3930-671-24 Table  4-2.  DS/GS Troubleshooting Procedures - CONT: MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ENGINE (CONT.) 5. BLACK EXHAUST SMOKE - CONT. Step 2. Check that fuel injection pump timing is properly set (Appendix F, Continentel Diesel Engine, Section 4.14, Section 5). If fuel injection pump timing is not set properly, set timing (Appendix F, Continentel Diesel Engine, Section 4.14, Section 5). If fuel injection pump timing is set properly, injection pump is faulty.  Replace injection pump (Appendix F, Continentel Diesel Engine, Section 4.14, Section 5). 6. WHITE EXHAUST SMOKE. Step 1. Check for faulty fuel injector(s) (Appendix F, Diesel Fuel Injection System, Section 5.3). If fuel injector(s) is faulty, replace injector(s) (Appendix F, Diesel Fuel Injection System, Section 5.3). If fuel injector(s) is OK, go to step 2. Step 2. Check that fuel injection pump timing is properly set (Appendix F, Continentel Diesel Engine, Section 4.14, Section 5). If fuel injection pump timing is not set properly, set timing (Appendix F, Continentel Diesel Engine, Section 4.14, Section 5). If fuel injection pump timing is set properly, go to step 3. Step 3. Check engine compression at each cylinder. If compression at any cylinder is below 325 psi (2241 kPa), or compression varies more than 40 psi (276 kPa) across all of the cylinders, go to step 4. If compression at all cylinders is at least 325 psi (2241 kPa), or compression does not vary more than 40 psi (276 kPa) across all of the cylinders, replace engine head gasket (Appendix F, Continental Diesel Engine, Section 4.14, Section 8). 4-4