audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Removing and installing fuel pressure regulating valveN276 > < Removing and installing air mass meterG70

A5

Checking fuel pressure regulating valveN276
Checking fuel pressure regulating valve -N276-
Special tools and workshop equipment required
   
t  Hose clamps for hoses up to 25 mm -3094-
t  Fuel-resistant measuring container
t  Test hose for return line connection
Procedure
  WARNING
Risk of malfunctions caused by dirt.
Observe → Chapter „Safety precautions when working on the fuel system“.
–  Pull off engine cover panel → Chapter.
  W00-0079
–  Detach fuel return hose -2-.
  Note
Disregard -items 1, 3-.
  A20-10928
–  Seal off open return line connection with a test hose -2- and a hose clamp up to 25 mm -3094-.
–  Hold end of fuel return hose -1- in measuring container.
–  Start the engine and run at idling speed.
l  Return flow rate (engine start): 0 ml
l  Return flow rate after 2 minutes: 30 ... 55 ml
If specified values are not obtained, fuel pressure regulating valve -N276- is defective.
  A23-10603

Removing and installing fuel pressure regulating valveN276 > < Removing and installing air mass meterG70