Help on fuel issues

It could be something minor like trash in the line.

How do I go about fixing that? Would I have to replace the fuel lines?

This is not a smarts question, but did you put on the filter the correct way? There should be an arrow pointing in the direction of the fuel flow. If you have access to an air pump, try removing the filter and then connect it from above and blow the line backwards. If it flows easy and clear, with no gunk coming out, it may be in the fuel delivery system at the injectors. That will be a lot of work, but you can blow out the lines also from the injector connections. Be careful, you are blowing gas, and no smoking when doing it. If the lines and injectors are clear, it may be in the gas tank or lines from them. Have fun.