We bought a miller trailblazer 325efi about 6 months ago really cool Machine welds at idle you can use hand tools at idle but had some sort of fuel problems. So we traded the first one for a new machine and it had fuel problems again so we got another one and it seems to idle sporadically sometimes and I get tons of arc blow almost Like I went to the machine and just cranked it up ,gouges a 1/2 deep hole in a second . At first I figured well its my setup or something I'm doing wrong tried everything I can possibly think of still getting random arc blow and I'm talking insanity. Is anyone else having similar problems with this machine?