LS stalls when AC turns on

[72Z/28]

Originally Posted by aany001

Wondering if anybody has come across this issue. Did an LS swap on my 69 camaro and when I kick the Vintage Air AC on the idle doesn’t bump up and it stalls. Any tips that can remedy this would be greatly appreciated.
Thanks
Steve

Steve please let us know once you fix this issue.
I am having exact set up as yours with OEM PCM and Cammed LS6.
The engine stalls and dies if I rev it when the vintage air AC is on. This happens when the AC clutch is engaged.

The rpm drops below the desired rpm and stalls. In fact, sometimes when letting off the throttle and pressing the clutch to come to a stop, the rpm drops and engine dies even before coming to a dead stop