plugs and injectors

[yaris9876]

I went to change the spark plugs on my hatchback and I cant get the socket on the first one.
The others are ok. I cant see way down in there because of the plastic tray...
How can I get the plug out????Never had that happen before.....
Also I have been having fuel trouble,low power intermittent, comes and goes, and I tore down the fuel system. I pulled the injectors and they look ok ..the screens look ok but no one around can test them for me... so I guess I will just replace the O rings and re install them.
Any suggestions on cleaning them before I put the back in????
another important thing.....I noticed that the fule line is metal for the first 16 inches or so...it turns and goes thru a hole in the metal casting that is part of the head. The only way to get the rail out to clean it is to pull it apart when it turns into rubber...it seems to do that in a strange looking white plastic bracket that has a little hinge door that opens in the back..
What is that for???? I was thinking of cutting the line and just bypassing that bracket and
running some extra rubber hose... is that ok??? It would make it easier to install and I dont know if that white plastic thing is needed????
any help appreciated...