AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual A4 1997 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1101/w960_1101-0.png AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual
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Page 1 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-107
 
  
Fuel supply system, servicing 
(vehicles with 2.7 ltr. turbo 
engine) WARNING! 
Always comply with all applicable safety 
precautions when working on the fuel system  
Note: 
 
Always repl

Page 2 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-108
 
  
2 - 
Fuel return line 
With Fuel Pump (FP)Attached from the inside to fuel pump 
flange To remove depress tab at connector
3 - 
Seal ReplaceWhen installing, insert dry into opening of 
fue

Page 3 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-109
 
  
7 - 
Fuel pump flange 
Can only be installed together with fuel 
pump. Removing and installing   Page 20
-118
Installation position: Note arrow   Page 20
-123
 
8 - 
Connector 
For fuel pu

Page 4 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-110
 
  
 Repair Manual, Fuel Injection & Ignition,Repair 
Group 24    10 - 
Fuel Pump (FP) 
With fuel screenCan only be replaced with fuel pump flangeRemoving and installing   Page 20
-118
Fuel pu

Page 5 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-111
 
  
Fuel pump, checking electrically
 
Vehicles with 2.7 ltr. turbo engine  
Special tools needed:  
 
VAG3217
 VAG1348/3A with VAG1348/3-2
 VAG1526 A
 VAG1594 A
Pa
ge 5 of 25 Fuel su
pp
ly sy

Page 6 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-112
      
Test conditions:  
     
Battery voltage at least 12 V 
     Fuse 28 OK 
    
Test sequence  
Relay 6 in central electric OK Fuel filter OK Ignition switched off. 
-  Open cover for fuse

Page 7 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-113
      
Note:  
     The fuel pump runs very quietly. Be sure to keep 
outside noise low when testing the fuel pump. 
      If you cannot hear the fuel pump run:  
     
-  Remove carpet liner i

Page 8 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-114
       If specified value was obtained even so you 
could not hear the fuel pump run, remove the fuel 
pump flange as follows:  
     
WARNING! 
     
Fire hazard! Remove everything from the ar

Page 9 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-115
 
    
If wiring and connections are OK:  -  Check electrical connections between flange and fuel pump, check for 
continuity. 
-  Fuel pump is faulty; replace pump   Page 20
-118
 .
Pa
ge 9 of

Page 10 of 25

AUDI A4 1997 B5 / 1.G Fuel Supply System Biturbo 2.8 Workshop Manual 20-116
      
Fuel pump delivery volume, checking
 
     
Vehicles with 2.7 ltr. turbo engine  
    
Special tools needed:  
Test conditions:  
Test sequence  
Remote switch VAG1348/3A with adapter wi
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