pumping air into liners

question when you pump the tube first the tube seal the tubeless valve to let air into the liner also can't get a pressure reading. they are Micky tubes.
Any advice

 

When you put the tube into the wheel, there should be a rubber "mat" that slides onto the valve stem so the air has a path to the holes in the stem. Also, the rubber washer that is on the outside of the wheel, secured by the stem nut, cannot be too deep or it will plug off the holes. You can trim this stepped washer to prevent this, if all else fails I have had to loosen up the nut about a half turn until you get a pressure reading, then tighten it back up.

 

Air

If you have separate valve stem for the outer tire, like the hoosier deal. The valve is probably over the edge of the liner.to cure it you need to groove the wheel from the stem to the edge of the tire/liner..just a slight cut in the aluminum to allow air to migrate