Well, the pick up plumbing is the problem. I suspect I have a partial blockage at the end of the pick up tube due to the sealer. I can still blow air through it, but I think it should flow a bit better. Of course there is no access to it. I was able to sneak a peak by snaking an inspection camera in there and I saw a glob of sealer on the end of the pick up tube. Essentially it's the same problem the original poster had. Perhaps all is well and I'm being paranoid.