FUEL SYSTEM
7-12
TNV DI Service Manual
Fuel System Specifications
Test and Adjustment Specifications
Note: Fuel injection pressure of a new fuel injector is reduced approximately 72.5 psi (0.5 MPa; 5.0
kgf/cm
2
) after about 5 hours of operation due to the initial break in of the engine. When adjusting a
new fuel injector or after it has been disassembled for service, adjust the fuel injector 72.5 psi (0.5
MPa; 5.0 kgf/cm
2
) higher than the above standard.
Note: All fuel injectors have a three character identification mark (Figure 7-3, (1)). The first character
starts with “V” or “W”.
Figure 7-3
**
Fuel injector identification is critical as each engine has a unique fuel injection pressure. The fuel
nozzle is specifically matched to the fuel injector by engine model and / or engine speed.
Model
Engine
Class
Injector ID
mark*
Fuel Injector Pressure
Fuel Injection Timing
3TNV82A - 4TNV88
CL
W
2843 - 2988 psi
(19.6 - 20.6 MPa;
200 - 210 kgf/cm
2
)
See Checking and Adjusting Fuel
3TNV82A - 4TNV88
3TNV84T - 4TNV84T
VM
W**
2843 - 2988 psi
(19.6 - 20.6 MPa;
200 - 210 kgf/cm
2
)
or
or
V**
3133 - 3278 psi
(21.6 - 22.6 MPa;
220 - 230 kgf/cm
2
)
4TNV94L - 4TNV106
4TNV98T - 4TNV106T
CL
VM
V
3133 - 3278 psi
(21.6 - 22.6 MPa;
220 - 230 kgf/cm
2
)
0004105
(1)
TNV_DI_SM_A4.book 12 ページ ２００７年１２月６日 木曜日 午前９時２３分
