So it’s still obviously the liner. You tested it right? Independent from the machine? You feel drag in there when pulling the wire back and forth? Sometimes one of my machines will start piling wire like I have a bad ground but it is the contact on the heat switch. I have to jiggle it a little to get my amperage back but I don’t think that is your issue.
It takes a good bit of effort with pliers to pull the wire through the liner. I don't think I could do it by hand. ....and yes, without the liner involved, it feeds like a sumbitch.
