1998 AUDI A4 Quattro Fuel Syst

20-76


CAUTION!
After installation, check for continuity between Ground clamp on
filler neck and chassis Ground.
Radio operating instructions - Connect lines according to markings:
1 - Supply line
2 - Bleed line to EVAP canister
3 - Return line
- Re-connect fuel pump and sender for fuel gauge harness connectors.
Specification: approximately 0 .
- Connect Ground strap to Battery with ignition OFF.
- After connecting Battery, input radio anti-theft code- Run door windows up to the stop using window switches.
- Operate all window switches again for at least 1 second in "closed"
position to activate automatic up/down.
- Re-set the clock.
Pa
ge 25 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-77

Tightening torques

Component
Nm
Clamp bands and/or carrier plate (for fuel
tank) on chassis 25
Nm
Clamp bands on fuel tank 2 Nm
Carrier plate on fuel tank 2 Nm
Cover on spare wheel well 10
Nm
Pa
ge 26 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-78


Fuel supply unit and sender for fuel gauge
-G, component overview

Vehicles with all wheel drive and 1.8 ltr. turbo or
2.8 ltr. engine
1 -
Sender for fuel gauge -G
Float is cube-shaped
- Check resistance values: Page 20
-99
Removing and installing: Page 20
-101
2 -
Return line
With fuel pumpOn inside of cover flangeRemoving and installing Page 20
-104
Disconnecting: press unlatch buttons on
connector piece
3 -
Sealing ring
-ReplaceInstalling: insert dry into fuel tank opening
Pa
ge 27 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-79


4 -
O-rings
- Always replace.
- Check installation position
5 -
Return line
From fuel distributor
- Mark before removal
- Note direction of arrow on flange
6 -
Supply line To fuel distributor
- Mark before removing
- Note direction of arrow on flange
7 -
Cover flange Removing and installing Page 20
-91
Location: Note arrow marking Page 20
-
97

8 -
Harness connector
For fuel Pump and sender for fuel gauge -
G
Pa
ge 28 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-80


9 -
Union nut
60 Nm
10 -
Wiring To fuel pump
- Attach with fuel resistant cable ties (item
11 )
11 -
Supply line Fuel pump/surge housingLocation Page 20
-95
12 -
Nut M4
1.5 Nm
- Install toothed washer beneath.
13 -
Nut M5 2 Nm
- Install toothed washer beneath.
Pa
ge 29 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-81


Repair Manual, Fuel Injection & Ignition, Repair
Group 24 14 -
Fuel supply unit
Removing and installing Page 20
-91
- Fuel pump electrical checks Page 20
-
82

- Residual pressure, checking:15 -
Fuel strainer
Connected to fuel supply unitCan not be replaced individually
- Clean if dirty
16 -
Surge housing lower section Installed in fuel tankCan not be removed
Pa
ge 30 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-82

Fuel pump, electrical checking


Vehicles with all wheel drive and 1.8 ltr. turbo
or 2.8 ltr. engine

Required special tools, testing equipment
and auxiliary equipment

VAG1348/3A Remote control using
VAG1348/3-2 adaptor cable
Fluke 83 multimeter (or equivalent)
VW 1594A adaptor kit
Pa
ge 31 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-83

Test requirements

Battery Voltage: 12 Volts minimum

Fuse 28 OK

Relay 6 in Fuse / Relay panel OK Fuel filter OK Ignition switched OFF.
Pa
ge 32 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3