TM 10-3930-669-20 2-13.  ENGINE SYSTEM TROUBLESHOOTING (CONT). 5.  EXCESSIVE SMOKE. INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) STE/ICE-R (Item 14, Appendix B) References TM 10-3930-669-10 Equipment Condition Engine OFF (TM 10-3930-669-10) MAIN POWER switch OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) KNOWN INFO TEST OPTIONS Fuel filter OK. Air filter OK. Visual inspection. POSSIBLE PROBLEMS REASON FOR QUESTION Air intake system leaking. Fuel connections leaking. Fuel injector(s) faulty. Air intake obstructed. Fuel injector pump faulty. Too much fuel in the fuel air mix causes  black  smoke.    Too  little fuel   in   the   fuel   air   mix   causes white smoke. ¬ 2-74