oops, hook up the vacume for 1.5 hours and then shut it off. Watch the
vacume gauge for 1 hour to see is you have a leak.If your compressor has
not been used for more than a year, you mostlikely have a leak on the shaft
seal and you will loose a bit of vacume, and 134a in the future. Dont
worry, you just have to recharge every spring about 1 pound. New
compressors have a shelf life of 18 months because of this.The owners
manuel in most cars say to operate your compressor for a few minutes in
winter for this reason. Sounds like your about 80% done.Let us know how it
works.