I just looked at it and it looks like the coupler with the BOV isn't completely sitting in all the way. Could this be making the popping noise? Might be a really dumb question, but could the pressure pop the coupler out?You can just leave the hose connected. The only other thing I can think of that might make a popping noise is if a coupler isn't seated properly somewhere but whooshing and pshhh noises are normal