Whats wrong w my 1995 chevy astro?

addendum to last question,I couldn't figure out how to add to it again,.I changed plugs,cap,rotor, noticed gas coming out of valve on one of the fuel lines after I was done,while I was tuning it up,i pushed on valve w a screwdriver to see if I had pressure,not much it seemed.I don't have a fuel pressure tester,I didn't even know what the valve was,I THINK,it's pressure relief valve,there's a proper name for it somewhere,and yes,I do use a lot of punctuation.Should a little gas come out of this valve?Maybe as it re-pressurizes?To answer my own question about whats wrong w van:it's 15 yrs old and has over 250,000 miles on it,but I'm broke and jobless,might as well fix what I can,huh?