TM  10-3930-638-24&P 3-4. FUEL SYSTEM TROUBLESHOOTING (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE  ACTION 5.  ERRATIC  ENGINE  OPERATION  (SURGE,  MISFIRING,  POOR  GOVERNOR  REGULATION)  (cont) Step 10. Remove and inspect idle spring (para 4-3b; notify general maintenance). a. If idle spring is broken or permanently set, replace (para 4-3b). b. If idle spring is okay, proceed to step 11. Step 11. Remove governor thrust sleeve and check for burrs and dirt (para 4-3b; notify general support maintenance). a. Remove burrs using crocus cloth; clean governor thrust sleeve as described in paragraph 4-3b. b. If governor thrust sleeve checks okay, proceed to step 12. Step 12. Check transfer pump parts for wear or damage (para 4-3b; notify general support maintenance). a. If transfer pump parts are worn or damaged, replace (para 4-3b). b. If transfer pump parts check okay, proceed to step 13. Step 13. Remove fuel injection pump regulating piston and sleeve and inspect for burrs, corrosion, and varnish  accumulation  (para  4-3b;  notify  general  support  maintenance). a. If piston and sleeve are burred, corroded, or varnish accumulation is present, replace (para 4-3b). b. If piston and sleeve check okay, proceed to step 14. Step  14.  Check  delivery  valve  screw  for  tightness  (para  4-3b;  notify  general  support  maintenance). a. If delivery valve screw is loose, tighten (para 4-3b). b. If delivery valve screw is tight, remove it. Then, remove delivery valve and inspect seat for erosion (para 4-3b). 1) If seat is eroded, replace delivery valve (para 4-3b). 2) If seat is okay, reinstall and tighten delivery valve screw (para 4-3b) and proceed to step 15. Step 15. Check delivery valve for cleanliness or improper installation (para 4-3b; notify general support maintenance). a. If delivery valve is dirty, clean or replace it (para 4-3b); if improperly installed, install correctly (para 4-3 b). b. If delivery valve is clean and properly installed, proceed to step 16. Step 16. Disassemble fuel injection pump and check cam roller shoes for burrs; also check for freedom of rotation,  chipping,  and  abrasive  wear  patterns  (para  4-3b;  notify  general  support  maintenance). a. Replace cam roller shoes if burred, sticking, chipped or abrasive wear pattern observed (para 4-3b). 3-12