I have just recently replaced my injectors for a set of mach 5's. Ever sense this upgrade the fuel line to the #4 cylinder has leaked fuel. Sense thin I have replaced the fuel line but it still leeks. Does any one have any experience with this?

 

you either over-tightened it and pitted the female end at the head or you're not tightening enough. i replaced all 6 lines and they all still leak slightly, except 6, which is a siv.