Giving JOE54 a thanks. I believe I found my high water pressure problem. The poppet is not all that easy to get to on this model promax as you can't get a straight shot into it or at least I'm not smart enough. I'll put a new one in this weekend and maybe try it soon.
Rocks in poppet by David Middleton, on Flickr
Rocks in poppet by David Middleton, on Flickr