TM 9-2320-387-24-l
FUEL SYSTEM
RUNNING ROUGH
POSSIBLE PROBLEMS
1
GLOW PLUGS
COLD ADVANCE
FUEL LINES
FUEL PUMP
FUEL FILTER
INJECTION PUMP
INJECTORS
KNOWN INFO
GLOW PLUGS OK
POSSIBLE PROBLEMS
COLD ADVANCE
FUEL UNES
FUEL PUMP
FUEL FILTER
INJECTlON PUMP
INJECTORS
r
RUN THE GLOW PLUG TESTS.
RETURN HERE IF NO FAULTS
FOUND.
DIAGNOSTIC FLOWCHART
ST OPTfONS
RUN GLOW PLUGS CIRCUIT
TESTS (Page 2-289). IF YOU ARE
SURE THAT THE PROBLEM
EXISTS WHEN THE ENGINE IS
WARM, YOU CAN SKIP THIS
QUESTlON.
REASON FOR QUESTION
Glow plug failures can cause
rough running when cold.
CHECK COLD ADVANCE CIRCUIT.
GO TO STEP C2, PAGE 2-114.
RETURN HERE IF NO FAULTS
FOUND.
COLD ADVANCE TESTS
(Page 2-114)
TEST OPTIONS
REASON FOR QUESTlON
A faulty cold advance circuit can
cause rough running.
2-120
