I just recently had this problem. The air is coming from the right side of the 'noid, out of the small hole in the front of the pilot assembly, correct?
I had sent it in, and it turned out to be the manifold gasket. The tech had swapped out all the other o-rings as well. He wasn't 100% sure if it was 'just' the gasket, but that was one of the final things he changed out before it was fixed.
Working like a champ now.