Mmm, P90s can get noisy yes. I remember speaking to a guy at Fralin after I first installed mine last year. He said its just "the nature of the beast" and I agree for the most part. Check the wiring, perhaps there's some poor grounding inside, but it's very possible that the noise is just what you get....when you want awesome P90 tone! I have embraced it and it doesn't bother me too much as long as I am conscious about turning guitar volume down anytime I am not actively playing.