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TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download

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TM 9-2815-202-34 MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 9. EXCESSIVE BLACK EXHAUST SMOKE Step 1. Check for excessive fuel or irregular fuel distribution. a. b. c. d. Check fuel injector timing (Refer to Para 8-5). Check injector rack linkage adjustment (Refer to Para 8-7). If necessary, perform complete engine tune up (Refer to Para 8-4 thru 8-13). Replace faulty injectors if this condition persists after performing steps a, b, and c above (Refer to Para 4-38). Step 2. Check air inlet for restrictions. a. Clean air cleaner elements. b. Clean blower housing screen. Step 3. Check for proper grade of fuel (Refer to appropriate vehicle LO). END OF TEST 2-13