Isuzu A-4BG1T - Page 172

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I II II I I I I I II II II II II I I I I I I I I I
12-A TROUBLESHOOTING
HARD STARTING
3)
ENGINE TURNS OVER BUT DOES NOT START
FUEL IS BEING DELIVERED TO THE INJECTION PUMP
Checkpoint
Trouble Cause
Continued from the previous page
OK I
tnjection nozzle
Injection pump
Remedy
Jnjection nozzle injection starting
pressure too low
Improper spray condition
I
I
NG
-i
Defective fuel injection nozzle
resulting in fuel drippage after
NG
t-i
Replace the delivery valve
fuel injection
Adjust or replace the injection
nozzle
NG
Defective injection pump control
NG
rack operation
I-
Repair or replace the injection
pump control rack
\
NG
Injection pump plunger worn or
stuck
NG
Replace the injection pump
plunger assembly
. ..C
OK
I
Injection pump (VE pump)
NG
injection pump drive shaft seizure
NG
Replace the injection pump drive
or other damage
shaft
I
t
7
i
NG
Injection pump governor spring
seizure
NG
Replace the injection pump
governor spring