I've been noticing that when my mig gun line has a loop or coiled in it the wire feed is not constant and smooth. The gun is older and has seen lots of use. Does the group think the liner needs to be replaced or could it be something else involving the wire feed. When I say it has a coil in it, I mean the line will sometimes coil around and lay on itself when I'm welding. I don't always have the Mig gun line completely pulled straight before welding.