TM 9-2320-387-24-l
FUEL SYSTEM
r
KNOWN INFO
I
ENGINE DOESN’T STAY
RUNNING
POSSIBLE
PROBLE.hlS
FUEL PUMP
FUEL SUPPLY LINES
FUEL RETURN LINES
FUEL FILTER
FUEL SOLENOID/WIRING
HIGH-PRESSURE
SYSTEM
FUEL PUMP
?UEL SUPPLY LINES
FUEL RETURN LINES
FUEL FILTER
FUEL SOLENOID/WIRING
HIGH-PRESSURE
SYSTEM
KNOWN INFO
FUEL PUMP OK
FUEL SUPPLY LINES OK
FUEL FILTER OK
DISCONNECT THE GLOW PLUG
CONTROLLER AND WIRE 5698
FROM THE INJECTOR PUMP. MAKE
SURE THAT WIRE 54A IS PROPERLY
CONNECTED TO THE INJECTOR
PUMP. WITH THE ROTARY SWITCH
IN RUN POSITION, DO YOU HAVE AT
LEAST 17.0 VOLTS DC FLOWING
THROUGH WIRE 54A?
DIAGNOSTIC FLOWCHART
;T OPTIONS
STE/lCE-R TEST 89
(Page 2-508)
MULTIMETER
REASON FOR QUESTION
Current through the wire quickly
checks the integrity of the fuel
system wiring. The normal
reading will be about 1.3 to 1.5
amps.
RECONNECT THE ABOVE WIRES.
CHECK FUEL PUMP PRESSURE
AND VOLUME DURING CRANKING.
IS PUMP PRESSURE GREATER
THAN 3 PSI (20.69 kPa) AND FUEL
VOLUME AT THE INJECTION PUMP
INLET 1 PINT IN 30 SECONDS?
1. STE/ICE-R TEST 24
(Page 2-494)
2. FUEL PUMP VOLUME TEST
REASON FOR QUESTION
Positive pressure and volume
indicate that fuel is present and
supply lines and filter are not
plugged.
This is a test of the lift
pump.
0 II
. .
83
TEST OPTIONS
DOES THE ENGINE START AND
PUT THE RETURN LINE IN A
STAY RUNNING WITH THE FUEL
SUITABLE CONTAINER
AND
RETURN LINE (THE SHORT
TRY STARTING THE ENGINE.
RUBBER LINE AT THE INJECTOR
PUMP) DISCONNECTED?
REASON FOR QUESTION
A restricted fuel return line will
I
I
cause a pressure imbalance in
the pump and prevent the engine
2-110
