No idea about the manual, but when doing injectors on my Subaru I pulled the fuel pump fuse and let the engine die. Your link mentioned the same tip. Simple and effective. Not a good idea with SPICA as it need gas for lubrication.

 

Pretty much every Bosch fuel injection system is designed to hold pressure in the lines between the pump and the fuel pressure regulator at shutoff, AFAIK. It's to help the car start up quickly after sitting.

If you have a mityvac hand pump, you can apply vacuum to the vacuum port on the fuel pressure regulator. This will relieve a lot of the pressure, but you still need to be careful when opening the lines. I pinch off the hose with hose pliers, disconnect the hose, and then release the fuel in a controlled manner.

Not sure what he was expecting from the clamps, but it's no higher than the running pressure (30-40 PSI) so good old hose clamps work fine. Though you should probably use the Euro-style ones as they don't have the holes that can cut into the hose over time.

 

Should not be a problem with the Spica system. It's a recirc system that maintains pressure through a small constantly open orifice in the outlet fitting of the injection pump. Soon as you turn the key switch off and the supply/boost pumps turn off, the pressure in the system very quickly bleeds through the open orifice and goes to zero.

 

I said the tank filter... it was the pump itself. Thanks for the input.. I'll pass along . and thanks on the Spica comments