Weld porosity HELP... Options

[ONTHEGRIND]

So I have a Lincoln hd 3200 mig that hasn't been used in a year or so.. I went and got a bottle filled last week argon co2 mix using solid .025 wire with the correct brand new tip welded on brand new steel tried the l/min from very low to very high always welds the same. I can here gas exiting the gun ground is clean here is a photo of what im working with.. The welds are very black be a wire brush on a die grinder makes a pass over them..

The top weld is c 5 settting what it recommends bottom is b5

(IMG:http://www.914world.com/bbs2/uploads_offsite/img.photobucket.com-9738-1387250279.1.jpg)

[MMW]

I would try a different bottle of gas to eliminate that. If you don't have access to one then I would take the current bottle & welder to someone that does have one or to your local welding supply. Then you can try it there with a new bottle. It is normal for places that refill their own small bottles to fill them from a bank of bottles by opening & closing several bottles to get the highest pressure they can. Your bottle is clearly marked 75/25 correct?

Also check first that when you turn off the bottle it does not bleed down right away. If it does this would indicate a leak somewhere. Some bleed down is acceptable.

Toolguy wrote -- "when welding does it sound like frying bacon or is it spitting any sputtering ??" You will not get the frying bacon sound on a weld that looks like that.

I would first rule out gas because that is what it looks like. Make sure the gun is plugged all the way into the machine.