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EXCESSIVE BLACK OR GRAY EXHAUST SMOKE FROM ENGINE
FUEL INJECTOR TEST - TM-9-2320-366-34-1_155

TM-9-2320-366-34-1 M1078 Series 2 1/2-Ton 4x4 Light Medium Tactical Vehicles (LMTV) Manual
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TM 9-2320-366-34-1 2-46 NO YES 3. 4. Air cleaner element serviced by emergency procedure. Air inlet system OK. Air cleaner element OK. Fuel setting OK. Injector timing OK. Is valve clearance adjustment correct? Improper valve clearance adjustment will cause fuel to burn unevenly and produce black or gray exhaust smoke. Air cleaner element serviced by emergency procedure. Air inlet system OK. Air cleaner element OK. Fuel setting OK. Injector timing OK. Valve clearance OK. NO YES Fuel Injector Test Refer to para 3-14 Is a loud combustion knock heard when actuating control shaft lever on each injector cylinder? Faulty fuel injector(s) will cause fuel to burn unevenly and produce black or gray exhaust smoke. Adjust valve clearance (para 3-14). Replace fuel injector(s) (para 4-2). KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION WARNING Read WARNING on following page. Incorrect valve clearance. Faulty fuel injector(s). Faulty fuel governor. Faulty fuel injector(s). Faulty fuel governor. Replace fuel governor (para 4-9). a9.  EXCESSIVE BLACK OR GRAY EXHAUST SMOKE FROM ENGINE (CONT)







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