Well its fixed. At least enough to use. I'll try to ignore the new leak at the base of the pumping side for a few days.
It was not the wet/dry cam. Took that apart 1st and put the new top valve gasket
and seat in. This did not help so figured it must be hose blockage.
Found a cap on the goose neck in the loop unscrewed it and released pressure. BTW there is a small valve in the cap and this is where the screeching noise
So with the pressure released the pump worked fine. This determined the blockage was after the goose neck. Tried to clear with flat wire, but ended up with an auger from lowes hooked up to a hand drill. Augered the heck out that hose for about 2 hours.
I haven't had this much fun since my last root canal.
Anyone care to comment on the leak at the base, suppose the base valve gasket
might do the trick.