I have been searching for a few days now and can not come up with a ansear to why my car stalls whenever I turn the a/c on at about 20 or so seconds after I turn it on, I cleaned and reset the IAC for the sake of, but she can not idle at normal rpm's with a/c on without raising to 12-1300 which I know is way too much, I also checked ffor vacum leaks, but did not try it with a vac guage, with no a/c she runs good no issues whatsoever
By the way it is a new compresser and accumilator and oriface tube.

 

If you have too much pressure in the A/C system it will make it stall. I had 450PSI on the high side and it was killing the engine. I lowered the pressure and now it isn't stalling. Check your pressure and see what it is.