24-9
Fuel injection system, servicing
Servicing ignition system:
Repair Group 28
Notes:
Fuel hoses in the engine compartment must be
secured with spring-type clamps. Screw-type
clamps or equivalent must not be used.
The Engine Control Module (ECM) has On
Board Diagnostic (OBD) capability, and is
equipped with Diagnostic Trouble Code (DTC)
memory. Before repairing or adjusting any
components or systems, first check DTC
memory. Also check all vacuum connections for
leaks ("false air").
For proper operation of electrical and electronic
components, a Battery Positive Voltage (B+)
supply of at least 11.5 volts is required.
Do not use any gasket sealers or other
automotive chemical compounds that contain
silicone. Traces of silicone drawn into the
engine pass unburned into the exhaust and can
damage the oxygen sensors.
Pa
ge 12 of 135 Motronic Multi
port Fuel In
jection
(MFI
) and i
gnition s
ystem
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.24.1
24-94
- Open fuel filler cap briefly (release pressure).
- Cover the fuel supply line connection (arrow) to protect against fuel
spray.
- Slowly open connection and catch leaking fuel.
Note:
The valve on the pressure tester must be open (lever pointing in direction
of flow). - Connect pressure tester VAG 1318 to fuel rail using adapters VAG
1318/11, VAG 1318/12 and VAG 1318/13.
- Start engine and let run at idle.
- Measure fuel pressure.
Specified value: approx. 3.5 bar (50 psi)
Pa
ge 129 of 135 Motronic Multi
port Fuel In
jection
(MFI
) and i
gnition s
ystem
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.24.1
