im running bc280s. After i go into boost and come to a stop, it dies on me everytime i have my a/c on. i also had a few scary moments on the highway. Id do a pull to about 130 and i put the gear in neutral and had the car die a few times on me ;O. thank goodness it was night time and no one was on the road... im taking mine to my tuner to get it fixed. whatever it is.

 

The car can be tuned to not die with the A/C on. Any "good" tuner should be able to do this quite easily. Only a few tables to adjust.

The problem is that every car is a bit different so we cannot just have a blanket fix for everyone.