I geuss the prior owner could have tried finding a leak with the dye and while I was vacuuming it out it never came out. The two cans that were put in are gone already with the recycling truck but I'm almost positive they were straight R-134a cause I still have the "1st charge" can with the dye, leak stop, and oil.

By they way I found out I wasn't doing the leak test right, after that it held negative pressure for ten minutes.

Anyways I'm not sure what to do from here. If I fill till the bubbles stop and tint my windows I'll be a happy camper till I need to charge it again, if needed. Or worse case, the compressor dies. <img src="/forums/images/graemlins/frown.gif" alt="" />

Being this is the first time working on AC I feel that I should have to do more, so should I purge the system and start over with new/unused gauges, vacuum, fill and see if the red shows again. Or am I just over thinking it.