Calling all AC guru's. Here is my problem. The air out of the vents were in the 60's, so I figured it was low on freon. I put a little in and waited and it didn't seem to work. So, I put more in and waited, all in all I put a whole 12oz can in it and it doesn't seem to have done anything. I don't know what the pressure was before I added the can, but I hooked my gauges up and this is what I got. It was around 100* the day I checked and the car was idling around 1000 rpm. When I first turned on the AC the hi side was 260 and the low side 40. After about 5 mins the hi side went to 300 and the low side was 52. I think it is way to high and might be over charged now. What pressure should I be looking for to get this thing blowing cold again?