TM 9-2320-387-24-l
FUEL SYSTEM
I
KNOWN INFO
I
DIAGNOSTIC FLOWCHART
FUEL SOLENOID OK
COLD ADVANCE OK
FUEL LINES
FUEL FILTER
FUEL PUMP
KNOWN INFO
FUEL SOLENOID OK
COLD ADVANCE OK
-1
FUEL LINES
FUEL FILTER
FUEL PUMP
KNOWN INFO
FUEL PUMP
-7
AND FILTER OK
POSSIBLE
PROBLEMS
1
INJECTION PUMP
INJECTORS
FUEL SUPPLY LINES
1
FUEL RETURN LINES
RETURN CHECK VALVE
I
KNOWN INFO
FUEL LINES, PUMP
AND FILTER OK
POSSIBLE
PROBLEMS
INJECTION PUMP
INJECTORS
EXHAUST RESTRICTED
4
1
t TEST OPTIONS
IS THE FUEL SUPPLY PRESSURE
1. STE/ICE-R TEST 24
GREATER THAN 3 PSI (20.69 kPa)
(Page 2-494)
AT ALL SPEEDS?
2. PRESSURE GAUGE
REASON FOR QUESTION
This is to verify that the fuel
supply lines, fuel pump, and fuel
filter are OK.
5
1
TEST OPTIONS
IS THE FUEL VOLUME AT THE
Fuel pump volume test
INJECTION PUMP INLET 1 PINT IN
30 SECONDS WHILE CRANKING?
This is to verify that the fuel
sup~lv lines. fuel oumo. and fuel
I
filter are OK.
’
6
1
1 TEST OPTIONS
DOES THE ENGINE RUN SMOOTHLY?
F;zN;PND LsTEN To
REASON FOR QUESTION
If it runs smoothly, then it is not
an individual cylinder fault such
as a bad injector.
TEST OPTIONS
IS THE IDLE SPEED 700 TO 750
ST&ICE-R
TEST 10 (Page 2-490)
