TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-l FUEL SYSTEM I KNOWN INFO FUEL SOLENOID AND WIRING OK POSSIBLE PROBLEMS FUEL RETURN LINES INJECTION PUMP INJECTORS RETURN CHECK VALVE KNOWN INFO RETURN LINES OK POSSIBLE PROBLEMS INJECTION PUMP INJECTORS KNOWN INFO I RETURN LINES OK POSSIBLE PROBLEMS 1 I INJECTION PUMP INJECTORS DOES THE ENGINE RUN POORLY WITH THE RETURN LINE DISCONNECTED? DIAGNOSTIC FLOWCHART VISUAL REASON FOR QUESTION Plugged fuel return lines cause back pressure which prevents injection pump from working properly. RUN THE INTAKE/EXHAUST TESTS. RETURN HERE IF NO FAULTS FOUND. L AIR INTAKE/EXHAUST TESTS (Page 2-141) intake/exhaust fault. If you came here from startability. this wasn’t t B6 COULD NOT VERIFY IF THERE IS AN INJECTOR OR INJECTION PUMP PROBLEM. NOTIFY DS MAINTENANCE (CHAPTER 14). 1 OPTIONS NONE REASON FOR TESTS A complete test of the fuel pump and injectors can’t be done at this level of maintenance but most fuel problems that would keep the engine from starting have been checked. 2-112