audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Checking injection quantity, leak-tightness and spray pattern of injectors > < Checking injectors
Motronic fuel injection and ignition system (6 cyl.)
Servicing Motronic injection system
Dismantling and assembling fuel manifold with injectors
 
N24-0596
  • Fuel manifold
  • To T-piece
  • Securing clip
    • ◆ Ensure tight fit
  • O-ring
    • ◆ Replace
  • Fuel pressure regulator
  • O-ring
    • ◆ Replace
  • Injectors -N30...-N33
    -N83, -N84
  • Securing clip
    • ◆ Ensure it is positioned correctly on injector and fuel manifold

Remove and install injectors

  • ‒ Remove engine covers.
  • ‒ Remove intake hose between air mass meter and intake silencer.
  • ‒ Unplug connectors from all injectors.
  • ‒ Pull vacuum hose off fuel pressure regulator.
  • ‒ Lay bare wires at fuel manifold.
 
A24-0068
  • ‒ → Unscrew fuel manifold from intake manifold.
  • ‒ Pull fuel distributor rail together with injectors off intake manifold and place it on a clean cloth at the back of the engine compartment.
Warning!
The fuel system is pressurised! Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
  • ‒ Pull off retainer and detach injector.

Note:

Replacement of fuel manifold involves detaching fuel hoses.

Installation is carried out in the reverse order, when doing this note the following:

  • ● Replace the O-rings at all opened connections. (When Replacing the front O-ring, make sure not to remove the plastic cap from the injector head. The O-ring must be pulled off over the plastic cap.)
  • ● Moisten the O-rings with clean engine oil.
  • ● Make sure that the injectors are installed in the correct positions.
  • ● Check to make sure that the retainer clamps are properly seated.
  • ● Position fuel manifold with secured injectors on intake manifold and press evenly into place.

Tightening torque

Component

Nm

Fuel distributor rail to intake manifold

10

Checking injection quantity, leak-tightness and spray pattern of injectors > < Checking injectors