Isuzu A-4BG1 Workshop Manual page 175

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
4:
TROUBLESHOOTING
12-7
UNSTABLE LOW IDLING
Checkpoint
Trouble Cause
Remedy
Continued from the previous page
OK
7
r
Injection pump
NG
Defective governor lever operation 0
NG
Repair or replace the governor
lever
t
NG
Regulator valve improperly
adjusted (VE pump only)
NG Adjust or replace the regulator
valve
I
NG
Broken plunger spring
NG
Replace the plunger spring
_ -
,
NG
Worn plunger
NG
Replace the plunger assembly
NG
7 Worn camshaft (In-line pump oniy) 1
NG
Replace the camshaft
NG
4
7
Worn cam disc (VE pump only)
NG
+ Replace the cam disc
c
Continued on the next page