welder acting up.. need help fast

my welder is making those tack welds.. or even regular welds that have the pits in it... you know how the gas gets caught inside and trapped in the puddle and bust out and it looks like mars... yea that. i have tried almost everythign to correct it... any suggestions? im tacking in the sheetmetal on my bed soi want better tacks than what this craphole is giving me. its a miller also so im shocked that is sucking butt. thanks for the help..

-pascal

clean metal?
gas on and right pressure?
did it use to work?

which miller?

mine only does that when im out of gas or the gas is turned off.

gas is on... its regulated to 34 cfh or like 16 of the red measuring numbers.... cant remember off top of my head what they are called. and i have like 1000 pounds of pressure.......its opened up and when i het the gun the little needle jumps around as if the machine is taking the gas. its a millermatic 135. also... i stuck my ear up to the mouth of the gun to listen for gas coming out and i cant really hea any.... maybe its not coming out?

did you recently change it to gas?
mine only did that on dirty metal.

nah been gas for a while now. i havnt used the welder in two months though. and i just cleaned all the metal right before hand....so...

would have to play with it. My brother Hobart 135 does that crap to me occationally.

make sure the nozzle and the tip are clean.

just cleaned it before i started welding anything

Try this out, turn your gas down to 12, clean your metal with alcohol, to get it as clean as possible, and are you welding inside or out?