I just had the E-Cor replaced in my 93 Camry, added freon, vacumned, and checked for leaks, for the first day is blew cold air, now if driving it blows hot air, but if idling it blows slightly cool air. I am at my witts end, can anyone help????

The only thing I can suggest is you take it back to the shop that did the A/C work. My best guess is it may still have a leak somewhere else in the system that is allowing the refrigerant to leak out. That's just a guess. It's hard to diagnose something like this on the internet.

Mike