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Fuel rail: Removing and installing > < Fuel pressure regulator valveN276: Removing and installing

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Fuel pressure senderG247: Removing and installing
Fuel pressure sender -G247-: Removing and installing
t  Fuel pressure sender -G247-: Removing → Anchor
t  Fuel pressure sender -G247-: Installing → Anchor.
Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.
Special tools and workshop equipment required
   
t  Engine sealing plug set -VAS 6122-, see equivalent → Anchor
  W00-10435
The fuel pressure sensor -G247--Pos. B- is located in the fuel rail and measures the momentary fuel pressure in the high pressure system and transmits a voltage signal to the engine control unit -J623-.
  Note
Item -A- can be disregarded.
Should the sender fail, the engine control unit will control the fuel pressure via a mapped open-loop backup function, allowing a maximum of approx. 3000 rpm.
Removing .
  WARNING
t  When carrying out work on the fuel system, always observe the guidelines for cleanliness and the instructions → Chapter.
t  Follow these instructions and rules for cleanliness before starting work and while working on the fuel system.
  N15-10500
–  Remove the engine cover upwards -arrows-.
–  Before removal, the surface of the thread around the fuel pressure sender (for example, using a commercially available refrigerant cleaning agent). Dirt must not enter the openings.
  Note
Proceed carefully. The cleaning agent should not enter in the connection.
–  Dry fuel pressure sender -G247-.
–  Disconnect the connector -Pos. B- from the fuel pressure sender -G247-.
  E10-10085
–  Unscrew fuel pressure sender -G247-.
–  Extract dirt from bore of fuel rail (threads and sealing surface). No mechanical tools should be used for this purpose.
–  Seal open fuel rail bore using a bung from engine bung set -VAS 6122-.
Fitting .
l  Specified torques → Chapter.
  Note
t  The fuel pressure sender -G247- has no sealing ring, but a deformable metal sealing.
t  Note damage of the sealing surfaces (bite-edge sealing) and thread of the newfuel pressure sender -G247- . If the fuel pressure sender -G247- was inspected and is in order, another reuse is possible.
t  Also check sealing surface at opening in rail.
t  The beginning of the thread and the deformable sealing lip of the fuel pressure sender -G247- must be lubricated with Molykote grease.
–  Screw fuel pressure sender -G247- on hand-tight.
–  Subsequently tighten the fuel pressure sender -G247- on the prescribed tightening torque → Chapter.
–  After installing fuel pressure sender -G247-, leave engine running at moderate speed for a few minutes and then switch off again to bleed fuel system.
  Note
The high-pressure connections must „not“ be opened for bleeding; fuel system bleeds itself automatically.
–  Interrogate fault memory and erase, if necessary.
–  Switch ignition OFF.
–  Carefully check the entire fuel system for leaks.
–  Renew the affected component if leakage still occurs after tightening to the correct torque.
–  Perform a test run and depress accelerator pedal to full throttle stop at least one time. Then the tightness of the high-pressure system must be checked again.
  Note
If there is any air left in the fuel system, the engine may switch to the backup mode ('emergency running' mode) during the road test. Switch off the engine and clear the fault memory. Then continue road test.
–  After road test interrogate the fault memory again.
  N15-10500

Fuel rail: Removing and installing > < Fuel pressure regulator valveN276: Removing and installing