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Removing and installing fuel pressure regulating valveN276 > < Bleeding fuel system after installing high-pressure pump

A4 Mk2

Checking fuel pressure regulating valveN276
Checking fuel pressure regulating valve -N276-
  WARNING
t  Always read rules for cleanliness and instructions for working on fuel system → Chapter.
t  Follow these instructions and rules for cleanliness before starting work and while working on the fuel system.
–  Remove engine cover panel → Chapter.
   
–  Detach fuel return line -1-.
  A23-10339
–  Seal off open return line connection with a plug -1-.
–  Attach a suitable hose -2- to open return line connection.
–  Hold end of this hose -2- in a suitable container to measure return flow rate.
–  Start engine and let it idle.
l  Specification: during the first 5 to 10 seconds return flow rate = 0 ml
If specification is not obtained, fuel pressure regulating valve -N276- is defective.
  A23-10328

Removing and installing fuel pressure regulating valveN276 > < Bleeding fuel system after installing high-pressure pump