on my a4--after points plugs condenser--the next thing i did was rebuild the carb. FYI i got a carb kit from o'rileys for 15bucks and it worked like a charm... that being said, it did take hours with lots of b12chemtool and qtips. i did it in sections and took pics as i took it apart to ensure i knew how to put it back together.... also that 'metal line' you refer to has (IIRC) A pin set inside the seat which maybe giving you a problem.
i would be very cautious running that thing until you get a GAS LEAK sorted out.
How inappropriate to call this planet Earth when it is quite clearly Ocean ~ Arthur C. Clarke