Snap On MW120 MIG Welder

Yes it has the Tweco gun and liner. I put a new liner in it today with the same results. The problem is it wads the wire up going into the beginning of the liner. It takes a while to do it though. The wire has to be damn near to the gun before it does it. Just for kicks, I tried spraying some penetrating oil in the liner.....I know you're not supposed to, just for diagnosis. And it fed great.....until it dried out. Also, I can cut the wire before it enters the liner and it feeds all day long. It wads the wire up no matter how tight I tighten it. I can pull the wire through the liner manually, but it does take pliers and does have some resistance. The old liner I removed, the wire was completely stuck.

Also it does "try" to weld but it never strikes an arc. It feeds the wire (when it will feed) the wire hits the work, turns orange and falls off. Seems to work "best" with the wire speed almost all the way down and the heat way up.

It's a 120V, btw with a standard grounded 120v plug. Any help is appreciated.
What size is the wire and tip. Is the wire old?