I had an O-Ring go bad on my A/C Condenser and I still had the old Freon in there so I just changed the O-Ring and did a retro kit for the new stuff and the problem has began.

It blows cool and will eventually get cold on a long drive but will not blow cold just driving around town. After changing the O-Ring I paid the place next door to my job to pull a vaccuum on it and they said it pulled and held a vaccuum fine. So I put on the retro fit couplers and started it up to add freon. The tag on the car shows it holds 30oz of freon but I was only able to put in 15oz (of oil and freon, a premix can). And the guage now shows it to be overcharged a bit.

But it does blow pretty cool, and gets cold on a long 10 mile or longer drive.

Any ideas? Please help because it's darn hot and I'm broke of course!