TM 5-3805-292-23
0006
ENGINE TROUBLESHOOTING - EXCESSIVE BLACK OR DARK GRAY SMOKE
0006
WARNING
DO NOT smoke or permit any open flame in area of SSL while you are servicing fuel system. Be sure hose nozzle is
o
grounded against filler tube during refueling to prevent static electricity.
DO NOT perform fuel system checks, inspections, or maintenance while smoking or near fire, flames, or sparks. Fuel
o
may ignite.
Wear fuel-resistant gloves and eye protection when handling fuels. If exposed to fuel, promptly wash exposed skin and
o
change fuel-soaked clothing.
ALWAYS shut down engine before refueling.
o
Failure to follow these warnings may result in injury or death to personnel or damage to equipment.
o
Test injector by performing cylinder
Does misfire
balance test (WP 0007) to locate
follow a suspect
misfiring injector. Once located,
Replace fuel injectors (WP 0043).
YES
swap that injector with a known good
injector?
injector (WP 0043).
NO
Disassemble air cleaner and
Remove restriction or replace air
check for restrictions or damaged
Restricted?
YES
filter (WP 0058).
or obstructed air filter (WP 0058).
NO
Check for oil intake from
Oil present?
Replace turbocharger (WP 0048).
YES
turbocharger (WP 0048).
NO
Replace engine (WP 0021).
