Its because your cars tuned man, half the guys on here block the blow off valve/go atmo bov then ask 'why is the car stalling, why do I get bad idle' etc etc
I used to get stalling with a blocked bov on stock ECU but not on the Power FC. I also didn't get stalling issues when running an atmo BOV on the Power FC but again thats probably because of the way its tuned
Its probably more to do with the way the stock ECU is tuned, it expects the air to recirculate back from the BOV to the intake and when it doesn't thats when you get stalling etc but who the hell would go get there ECU tuned after blocking there bov? Thats stupid
Your running after market ECU, tune etc thats why you don't get stalling but who the hell is going to block there BOV then go get a tune done just for that?
Majority of people do it on stock ECU, run into stalling issues, idle problems and all the rest of it, then a thread goes up asking why