ARMY TM 9-2815-259-24 AIR FORCE TO 38G1-125-2 MARINE CORPS 09249A/09246A-24 4-1 CHAPTER 4 DIRECT SUPPORT MAINTENANCE INSTRUCTIONS Section I.  TROUBLESHOOTING 4.1. DIRECT SUPPORT TROUBLESHOOTING PROCEDURES. Purpose of  Troubleshooting Flowchart. This section contains troubleshooting information for locating and correcting operating troubles which may develop in the engine.  Each malfunction for an individual component, unit, or system is followed by a list of tests or inspections which will help you to determine probable causes and corrective action to take.  You should perform tests/inspections and corrective actions in order listed. Table 4-1 cannot list all malfunctions that can occur, nor all tests or inspections and corrective actions.  If a malfunction is not listed or cannot be corrected by listed corrective actions, notify your supervisor. NOTE Before you use Table 4-1, be sure you have performed your PMCS.  Prior to performing troubleshooting procedures within this manual, perform troubleshooting procedures per TM 9-6115-671-14. SYMPTOM INDEX Malfunction Page Engine Fails to Crank ...................................................................................................  4-2 Starter Operates But Engine Does Not Turn Over........................................................  4-3 Engine Cranks But Fails to Start...................................................................................  4-4 Engine Misfires Or Runs Erratically Or Stalls Frequently............................................  4-5 Engine Does Not Develop Full Power..........................................................................  4-6 Engine Overheating ......................................................................................................  4-7 Excessive Oil Consumption..........................................................................................  4-7 Low Oil Pressure ..........................................................................................................  4-8 Excessive Fuel Consumption........................................................................................  4-9 Black or Gray Exhaust Smoke......................................................................................  4-10 Blue or White Exhaust Smoke......................................................................................  4-11 Engine Knocks..............................................................................................................  4-12 Engine Makes Abnormal Noise ....................................................................................  4-13