a/c problems cold in morning ,hot in afternoon.vacumned down added dye and oil recharged.?

When it quites blowing cold does it freeze up or do the pipes get warm? Sounds like there's a blockage somewhere in the system. Either a filter or condenser is plugged. It almost sounds like there's not quite enough freon. You can't just go by pressure on the guages, and the low side should be 25. However, it should be taking 3 to 3 & 14oz or 16oz cans, roughly enough to ad up to whatever the specs call for. Some vehicles call for 1.8 lbs others 2.2 lbs, others 3.2 lbs., etc. If you need anything else just email me.

Okay, you vacuumed the system down but how did you put the refrigerant back in? Did you use cans and if so, did you purge the air that is in the line that goes from the can to your shrader valve? It sounds to me like you have air in the line. If it's cooling in the morning and not cooling as well during the heat of the day, it does not sound as though you have a blockage. If you had a blockage, you wouldn't have cold air at all.

Your low side is a bit on the low side. Generally around 30 on the low 190 to 200 on the high is good.

I think you have air in the line as well as being a bit low. Evacuate the system, pull a good long vacuum and put the proper amount of refrigerant back in. I suspect that your system probably holds less than two pounds. I'm at home and don't have a chart here.

Good luck.

If you recharged with an oil charge, you have too much oil in the system and the system will need to be flushed. If I've said it once, I've said it a hundred times on here, A/C work should not be done by DIYers. You tried to save a few bucks and now you will HAVE to take it to a professional to be fixed. The people that make those recharge kits really know what they are doing.

Some people refer to the Dryer as a filter, the dryer should be replaced when ever the system is opened.

My guess