Isuzu KB P190. Manual - part 390

FUEL SYSTEM (4JK1/4JJ1)  6C-19 

Fuel Rail Pressure Sensor 

Removal 

1. Disconnect the fuel pressure sensor harness

connector (1). 

 

 

 

 

 

LNW76CSH001601

2.  Remove the fuel pressure sensor (2). 

Note: Cover the areas exposed during parts removal to
prevent the entry of foreign material into the fuel
system. 

 

 

 

 

 

 

 

 

 

 

RTW76CSH000101

Legend 

 1. Fuel 

Rail 

  2.  Fuel Rail Pressure Sensor 

  3.  Fuel Pressure Limiter   

 

 

 

Installation 

1.  Install the fuel pressure sensor. 

Tightening torque: 98 N·m (10.0 kg·m/72 lb ft) 

2.  Connect the fuel pressure sensor connector. 

 
 

6C-20  FUEL SYSTEM (4JK1/4JJ1) 

Fuel Pressure Limiter 

Removal 

1.  Remove the leak off pipe and hose (1). 

Note: Cover the areas exposed during parts removal to
prevent the entry of foreign material into the fuel
system. 

 

 

 

 

RTW76CSH000301

2.  Remove the fuel pressure limiter. 

Note: Cover the areas exposed during part removal to 
prevent the entry of foreign material into the fuel 
system. 
 

 

 

 

 

 

 

 

 

 

 

 

RTW76CSH000101

Legend 

 1. Fuel 

Rail 

  2.  Fuel Rail Pressure Sensor 

  3.  Fuel Pressure Limiter   

 

Installation 

1.  Install the fuel pressure limiter. 

Tightening torque: 172 N·m (17.5 kg·m/127 lb ft)

2.  Install the fuel leak off pipe and hose using the 

mounting eyebolt using the specified torque. 

Tightening torque: 10 N

⋅⋅⋅⋅m (1.0 kg⋅⋅⋅⋅m/87 lb in) 

 

FUEL SYSTEM (4JK1/4JJ1)  6C-21 

Fuel Rail Assembly 

Components 

 

 

 

 

RTW76CLF000301 

Legend 

  1.  Injection Pipe (#1 to #4) 

  2.  Fuel Feed Pipe Assembly 

  3.  Injection Pipe Clips 

 

 4. Fuel 

Rail 

  5.  Fuel Rail Bracket 

  6.  Fuel Leak Off Pipe and Hose 

 

 

Parts of the fuel system such as the internal part of the
fuel injector, holes and clearances that form passages 
for fuel are finished to a very high degree of accuracy. 

They are therefore highly sensitive to foreign matter and
the entry of foreign matter could cause damage to the
fuel passage. Therefore, effective measures should be
taken to prevent the entry of foreign matter. 

 

 

6C-22  FUEL SYSTEM (4JK1/4JJ1) 

Removal 

1.  Remove the starter motor. 

•  Refer to the removal procedure for engine

electricals in this manual. 

2. Remove the fuel feed pipe (1) for supply pump. 

Note: Cover the areas exposed during parts removal to
prevent the entry of foreign material into the fuel
system. 

 

 

 

RTW76CSH000501

3.  Remove the fuel hose (1).  

Note: Cover the areas exposed during parts removal to
prevent the entry of foreign material into the fuel
system. 

 

 
 
 

 

RTW76CSH000601

 

 

4.  Remove the leak off pipe and hose (1). 

Note: Cover the areas exposed during parts removal to 
prevent the entry of foreign material into the fuel
system. 

 

 

 

 

RTW76CSH000301

5.  Disconnect the fuel rail pressure sensor harness 

connector (1). 

 

 

 

 

 

LNW76CSH001601