Try the old regulator first.
At one time I did have oil in the airbox which was cleaned out and the air filter was replaced. I removed the MAP sensor and cleaned it so far it seems to have fixed the problem. I will provide an update next week if I see the problem come back. Thank you for everyone's help.Are you reading the pressure when it actually stalls? Also, have you checked/cleaned the mapts sensor? Just wondering if you might be running an oiled air filter.