Isuzu 4JB1 User Manual

SERVICE INFORM
ATION 00 – 7
Checkpoint Possible cause Correction
Inj
ection timing improperly adjusted Adjust the injection timing
Ins
ufficient injection volume Adjust the injection volume
Def
ective idle spring Replace the idle spring
Def
ective governor lever operation Repair or replace the governor lever
Regulator
valve improperly adjustment Adjust or replace the regulator valve
Br
oken plunger spring Replace the plunger spring
W
orn plunger Replace the plunger assembly
Inj
ection pump
(Cont’d)
Worn cam disc Replace the cam disc
Valve c
learance Valve clearance improperly adjusted Adjust the valve clearance
Com
pression pressure Blown out cylinder head gasket. Worn
cylinder liner.
Piston ring sticking
Replace the related parts
3. INSUFFICIENT POWER
Checkpoint Possible cause Correction
Air
cleaner Clogged air cleaner element Clean or replace the air cleaner
element
F
uel Water particle in the fuel Replace fuel
F
uel filter Clogged fuel filter element Replace the fuel filter element or the
fuel filter cartridge
F
uel feed pump Defective fuel feed pump Repair or replace the fuel feed pump
Inj
ection nozzle sticking Replace the injection nozzle
Inj
ection nozzle
Injection nozzle injection starting pressure
too low
Improper spray condition
Adjust or replace the injection nozzle
F
uel injection pipes Fuel injection pipes damaged or obstructed Replace the fuel injection pipes

Isuzu 4JB1 Specifications

General

Brand	Isuzu
Model	4JB1
Category	Engine
Language	English