Tig gas problem

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I can't hardly weld a two inch stringer, fillet or fusion weld without losing gas coverage somehow and consequently I experience porosity.  I have good consistent flow to the machine from the regulator.  I have pre-flow and post flow.  I have double checked any crimped hose, none.  No fans, heaters or drafts.  It's a brand new welder HTP 201.  Does it sound like a bad gas solenoid?  If so can I do something to isolate that component.  Any constructive responses are apreciated.----Flatliner
Reply:Can you feel or hear the gas coming out of the torch? It is Argon right? If all is well possibly use a larger cup size so the gas covers the weld area better.
Reply:Whats your regulator output setting?...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Yes, I can hear and feel gas exiting the torch.  The regulator is set at 20 psig.
Reply:If the gas is flowing, you might have other things. Are you certain the gas flow slows/ shuts off?? Your machine has some parameters. Check your postflow to be sure it is set to run for maybe 5 seconds. If you have the postflow set, you should hear the gas run after you back off the pedal. Without it, you can get bad porosity issues. Also, if the gas is flowing, possibly the steel you are welding has some oils or other impurities that are contaminating your weld. I have had what I thought was good steel do this to me before.And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:Originally Posted by flatlinerYes, I can hear and feel gas exiting the torch.  The regulator is set at 20 psig.
Reply:Originally Posted by flatlinerYes, I can hear and feel gas exiting the torch.  The regulator is set at 20 psig.