TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
Page TS-49
Engine Runs Rough or Misfires (Continued)
Cause
Correction
Check the injectors and replace any malfunc-
Injectors worn or malfunctioning
.......
tioning injectors. Refer to Procedure 006-026.
OK
E
Perform the compression check to identify the
ngine compression is low
.......
malfunction. Correct as required. Refer to
Procedure 014-008.
OK
F
Remove the fuel pump. Refer to Procedure
uel injection pump is malfunctioning
.......
005-012 or 005-014. Calibrate the fuel pump.
OK
C
amshaft timing is not correct (after engine
Check the gear train timing alignment. Refer to
.......
rebuild or repair)
Procedure 001-008.
OK
C
Inspect the camshaft and tappets. Refer to
amshaft, tappets, or pushrods are damaged
.......
Procedure 001-008 or 004-015.
L-633
