There are no "archives" as such, just old posts to the NG, so don't look
for something that doesn't exist. My NG post was to describe the cure
for a delayed hot start problem.
They are fed by a fuel rail whose connection to each is sealed by a
rubber "O" ring.
The injectors' connection to the engine is sealed by an "O" ring.
The injectors can be professionally cleaned and flow tested for not much
money. Do a Google search: "fuel injector service" for a shop to do
this. Injectors that are internally rusted or corroded need to be replaced.
The trick to removing the injectors is to depressurize the 45 psi fuel
rail so fuel doesn't spray all over. I read that some Volvo owners run
the engine and pull the fuel pump relay to cut off the fuel supply and
so let the engine reduce the pressure.