TM 10-3930-675-20-1 0006 00-3 TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED 0006 00 Table 1. Engine Troubleshooting Procedures (Non-Error Code) - Continued. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 7. Engine Performance (Power) - Low - Continued. 5.  Check  for  air  in  fuel  system and restricted fuel return line. Tighten,  repair,  or  replace  fuel system lines and hoses (WP 0059 00). 8.   Engine Runs Rough. 1.  Check  for  air  in  fuel  system and restricted fuel return line. Tighten,  repair,  or  replace  fuel system lines and hoses (WP 0059 00). 2.  Check  for  loose  or  damaged engine mounts. a.  Tighten loose engine mounts. b.  Notify   DS   Maintenance   if engine mounts are damaged. 3.  Check   and   monitor   engine operating temperature. a.  Allow   engine   to   warm   to operating temperature. b.  Perform cooling system troubleshooting  checks  (WP 0005 00). 9.   Engine Speed Surges (Idle or Under Load). Check  for  air  in  fuel  system  or restricted fuel line or hoses. Tighten,  repair,  or  replace  fuel system lines and hoses (WP 0059 00). 10.  Engine Shuts Off Unexpectedly. 1.  Check  for  faulty  fuel  shutoff valve solenoid (FSOV). a.  Tighten   any   loose   connec- tions (WP 0055 00). b.  Check for power at FSOV (12 volts) (WP 0055 00). 2.  Check  for  air  in  fuel  system and   restricted   fuel   line   or hoses. Tighten,  repair,  or  replace  fuel system lines and hoses (WP 0059 00). 3.  Check for damaged and loose battery connections. Tighten or repair battery connections (WP 0108 00). 11.  Engine Starts But Will Not Keep Running. 1.  Check for clogged fuel/water separator. Replace     fuel/water     separator (WP 0058 00). 2.  Check  for  air  in  fuel  system and   restricted   fuel   line   or hoses. Tighten,  repair,  or  replace  fuel system lines, hoses, and fittings (WP 0059 00). 3.  Check  for  faulty  fuel  shutoff valve solenoid (FSOV). a.  Tighten   any   loose   connec- tions (WP 0055 00). b.  Check for power at FSOV (12 volts) (WP 0055 00).