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Checking fuel pressure and residual pressure (up to high-pressure pump) > < Removing and installing intake manifold

A3 Mk2

Removing and installing fuel rail
Removing and installing fuel rail
Removing fuel rail
Intake manifold must be removed. Removing intake manifold → Chapter
   
–  Disconnect fuel pipes from high-pressure pump -1- (pipes have “ridge” at the connection point to ensure proper sealing and correct attachment of pipe).
–  Unscrew the four securing bolts for fuel pipes.
–  Unplug connector -2-.
–  Remove hose -3- from oil separator for crankcase breather.
–  Unplug connector at intake manifold flap motor -V157-.
–  Unplug connector -5- at fuel pressure sender -G247-.
–  Unplug connector -6- from fuel pressure sender for low pressure -G410- (not fitted on engines with code letters BVZ and BVY).
  A24-0797
–  Loosen securing screws for fuel rail: 6 Allen screws and 2 nuts with washers.
–  Pull fuel rail with air flow control flaps off injectors.
–  Detach connectors from injectors.
Installing fuel rail
  Note
t  Renew seals and O-ring.
t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Parts catalogue.
–  Lift air flow control flaps slightly when fitting fuel rail (lower section of intake manifold) on cylinder head.
  Note
If this is neglected, the air flow control flaps can become stuck between the fuel rail and cylinder head so they will not function when assembly has been completed.
The remaining installation steps are carried out in the reverse sequence.
  A24-0798

Checking fuel pressure and residual pressure (up to high-pressure pump) > < Removing and installing intake manifold