S4 V8-4.2L (BHF) (2004)
Leak Detection Pump: Vacuum and Vapor Hose Diagrams
EVAP Canister And Leak Detection Pump (LDP), Hose Diagram (8-cylinder Engines)
1
-
Throttle Valve Control Module -J338-
2
-
Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-
-
Component location: Front right in engine compartment
3
-
Ventilation line
-
From EVAP canister to Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-
-
Installation position: Right side, beneath vehicle floor
-
Secured to fuel tank in fuel tank area
4
-
Ventilation line
-
to gravity valve on fuel tank
5
-
EVAP canister
-
Component location: Bottom of spare tire well
6
-
Connection hose
-
Leak Detection Pump (LDP)/EVAP canister
-
Pressure side
7
-
Leak detection pump (LDP) -V144-
-
Component location: Under wheel housing liner in rear left wheelhousing
8
-
Air filter
-
for Leak detection pump (LDP) -V144-
9
-
Vacuum line
-
to Leak detection pump (LDP) -V144-
10
-
Vacuum reservoir
-
for Leak detection pump (LDP) -V144-
-
Component location: Under wheel housing liner in front left wheel housing
11
-
Separating point
-
Component location, see Fig. 1
12
-
Check-valve
-
Installation position (light/dark side): Arrow points in direction of flow, as shown in figure.