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Removing and installing fuel pressure regulating valveN276 > < Checking fuel pressure (low pressure)

A4 Mk3

Checking fuel pressure regulating valveN276
Checking fuel pressure regulating valve -N276-
Special tools and workshop equipment required
t  Fuel-resistant measuring container
  Caution
Risk of malfunctions caused by dirt.
Observe → Chapter „Rules for cleanliness and instructions for working on fuel system“.
–  Pull off engine cover panel → Chapter.
   
–  Release hose clip -arrow- and detach fuel return hose from fuel rail.
–  Seal off open fuel return hose with a clean plug.
  N15-10402
–  Connect test hose -2- to return line connection of fuel rail -3-.
–  Seal off open fuel return hose -1- with a clean plug.
–  Hold end of test hose into measuring container -4- to measure return flow rate.
–  Start engine and let it idle for 30 seconds.
l  Specification: 90 … 110 ml in 30 seconds
If specification is not obtained, fuel pressure regulating valve -N276- is defective.
  A23-10457

Removing and installing fuel pressure regulating valveN276 > < Checking fuel pressure (low pressure)