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Page Title: EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (ENGINE AT NORMAL OPERATING TEMPERATURE). (Cont)
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TM 9-2320-364-34-1
Allow engine to cool before performing troubleshooting maintenance. If necessary use insulated pads
and gloves. Hot engine components will burn and cause injury to personnel.
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
DDEC MODE 11 TEST
(1) Connect DDR to DDL connector
MC13.
(2) Start engine (TM 9-2320-364-10).
(3) Select mode 11 to display pulse
widths on DDR.
(4) Compare pulse widths of all eight
injectors.
(a) If pulse widths are less than the
NO CUT OUT PW (pulse widths),
or different from cylinder to
cylinder, perform Steps (5) and (6)
below and replace injector
(Para 4-2).
(b) If pulse widths are equal to or
greater than the NO CUT OUT
PW (pulse widths), perform Steps
(5) and (6) below and go to Step 3
of this Fault.
(5) Turn OFF ENGINE switch.
(6) Disconnect DDR from DDL connector
MC13.
INJECTOR TIMING CHECK
Check injector timing.
(1) If injectors are out of time, time
injectors (Para 3-2).
(2) If injectors are in time, go to
Step 4 of this Fault.

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