fuel line disconnect tool

any autoparts store, carry the fuel line disconnect tool. get the plastic one. the metal ones are not that great.

Available pretty much at any parts store. You just need the disconnect tool and some patience to see exactly how it works.

Look in the A/C repair section for the fuel line tools. They look like little plastic top hats. You will need the 1/2" & 5/8" ones. The hat shaped section goes on facing the large part of the coupling. Then you press hard on the brim until it forces the sleeve into the coupling and releases the spring. You may need someone to pull on the line while you press on the coupling. Put some motor oil on them when you put the line back together.

See http://www.midwayautosupply.com/showproduct.aspx?productid=11741&affiliateid=10050 for more information