TM 5-3805-292-23
0006
ENGINE TROUBLESHOOTING - ENGINE RUNS ROUGH OR MISFIRES
0006
Perform cylinder balance test
Any dead
(WP 0007). Take note of any
NO
cylinders?
dead cylinder.
YES
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
Check fuel injection lines for
Replace fuel injection lines
damage, leaks, or obstructions
Lines okay?
NO
YES
Test injector nozzle by
performing cylinder balance
Replace fuel injectors
test (WP 0007) to locate
Does misfire follow
YES
misfiring injector. Once located,
suspect injector?
swap that injector with a known
good injector (WP 0043).
NO
NO
Check valve lash (WP 0056).
Okay?
Adjust valve lash (WP 0056).
NO
YES
Check torque on flywheel bolts
Replace engine (WP 0021).
NO
Incorrect?
YES
Remove and install flywheel bolts