Bubbles mean too little refridgerant, not too little pressure. It's important to remember that these are 2 entirely different things.
I believe what is happening is you did not evacuate the system first after replacing o-rings, so you are trying to push refrigerant into a system that already has air and moisture in it. You're compressor is pumping and making pressure, but you aren't getting the condesation/evaporation action to the degree needed because your system has nitrogen,CO2, and watervapor in it.
The refill cans you buy at parts stores should only be used on a closed system that has never been depressurized, or you need to take it to a place that can vac out all the air before trying to fill it.
Yes yes. VERY important. If trying to push refrigerant into a system that has air as well, the results will not be good. I think you nailed it Gloyale.
175eya - did you use a vacuum pump to evacuate the system before you put in the refrigerant? If not, you will never get your system working for the reasons Gloyale has stated above. Plus you will ruin your system with the moisture. Get the system evacuated or get a vacuum pump and manifold gauge set and do it yourself. Harbor Freight has both and you can get them for under $160 in total. If you have a buddy who also has ac trouble, maybe you can split the cost. Or take it somewhere and have them do it. Also they can test to see if it will hold a vaccum. Then refill with refrigerant.
I ran the vacuum for an hour to ensure all the moisture boiled off when I did mine.
Edited by MR_Loyale, 02 July 2013 - 09:34 PM.