A4 Mk3
Fuel rail (MPI) - exploded view |
1 - | Bolt |
q | For fuel rail for MPI injectors |
q | 9 Nm |
2 - | Fuel rail for MPI injectors |
3 - | O-ring |
q | Renew |
4 - | Injector |
q | Renew O-rings |
q | Ensure correct installation position. |
q | Removing and installing → Chapter |
5 - | O-ring |
q | Renew |
6 - | Retaining clip |
7 - | Spring-type clip |
8 - | High-pressure pump |
q | With fuel pressure regulating valve -N276- |
q | An electric fuel pump (fitted in fuel tank) supplies fuel to the mechanical high-pressure pump |
q | When installing the high-pressure fuel pump, it is essential to ensure that no dirt enters the fuel system. |
q | The fuel system must not be under pressure when installing the high-pressure pump; procedure for reducing fuel pressure → Chapter |
q | Fuel pipes must be free of tension when installed. |
q | Removing and installing → Chapter |
9 - | Connecting piece for fuel supply line |
q | Renew |
q | 40 Nm |
10 - | Union nut for fuel supply line |
q | Fuel supply line to fuel rail for FSI injectors |
q | Lightly lubricate ball of fuel supply line with engine oil |
q | Fuel supply line must be free of tension when installed (make sure all parts are clean) |
q | 27 Nm |
11 - | Fuel supply line connection |
q | 15 Nm |
12 - | Clip |
q | Renew |
13 - | Bolt |
q | 5 Nm |
14 - | Fuel supply line |
q | Fuel supply line to fuel rail for MPI injectors |
q | Fuel supply line must be free of tension when installed (make sure all parts are clean) |
15 - | Vacuum unit for air flow control flaps |
16 - | Vacuum hose |
17 - | Intake manifold flap valve -N316- |
18 - | Intake air temperature sender -G42- with intake manifold pressure sender -G71- |
19 - | Bolt |
q | 5 Nm |
20 - | Intake manifold |
q | Removing and installing → Chapter |
21 - | Intake manifold flap potentiometer -G336- |
q | After intake manifold flap potentiometer -G336- has been removed, installed, or renewed, it must always be re-adapted to engine control unit -J623-; see „Guided Functions“ using → Vehicle diagnostic tester. |
22 - | Nut for intake manifold |
q | 9 Nm |
23 - | Bolts for intake manifold |
q | 9 Nm |
24 - | Gasket |
q | Check for damage and renew if necessary |
25 - | Fuel pressure sender for low pressure -G410- |
q | Must be screwed onto adapter -item 26- |
q | 15 Nm |
q | Removing and installing → Chapter |
26 - | Adapter |
q | Must be screwed onto fuel pressure sender for low pressure -G410- |
q | Renew O-ring |
q | 15 Nm |
27 - | O-ring |
q | Renew |
28 - | Clip |
q | For securing fuel pressure sender for low pressure -G410- in fuel rail |