This isn't helpful information. You can't properly purge an A/C systme of air by adding R134a to the low side while the high side is slighly open until some starts to escape from the high side.
To properly purge the system, it must be pumped down to a vacuum of nearly 30" and continueing to pump for 30 minutes. If you don't, you will leave a lot of moisture in the system that will damage things.
You are at the point that you need special tools and more training than can be given over a forum like this. It is time to take it to a shop and pay for professional services. If you don't, you are likely to end up damaging so much that the repair bill will be MUCH higher.
