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sounds like you either have a issue with moisture in the system or the old compressor put a lot of trash in the system that is causing issues even though you have blown it out. Sometimes you just have to write off your losses and move on. I really can't say for sure what the issue is but I would redo the entire thing, blow the system out again make sure the oil is changed on your vacuum pump and pull a vacuum to at least a 500 micron vacuum.
Here is a capillary tube chart to go by - click here for chart