Isuzu A-4BG1T - Dark Exhaust Smoke

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
1248 TROUBLESHOOTING
DARK EXHAUST SMOKE
Checkpoint Trouble Cause
Remedy
L
Air cleaner
NG
Clogged air cleaner element
NG
Clean or replace the air cleaner
element
i
I
.
Injection nozzle
I
NG
Injection nozzle injection starting
pressure too low
NG
Adjust or replace the injection
Improper spray condition
nozzle
.
OK 1
1
Fuel injection timing
NG
Fuel injection timing itiproperly
adjusted
NG
a Adjust the fuel injection timing
.
i
I
OK 1
Injection pump
NG
Defective delivery valve resulting
NG
1 in fuel drippage after
Replace the delivery valve
fuel injection
,
I
t
NG
Excessive injection volume
NG
I
Adjust the injection volume
L
.