I converted to vacuum and everysince, I have a sound like its squeezing a diaphram when I get into it. I do have a slight hole in my intercooler, but I believe it still didnt make this noise when I had the Powercrapster on there. The Powermaster actually worked real well, but just didnt like the fact that they were known and prone to go bad, happend to me twice, Three times your out So I didnt want to take that third chance. Anyone have this same sound or maybe what it is.