Found problem! This morning I shut it down, eptied it out,clean,inspeect, all OK. Took stove pipe apart- problem found!
Were block chimney ends and turns into 90 going into basement and stove pipe starts it was all loaded up from creosote from burning wood for past 30 days with damper 3/4 shut. The last time I burned wood prior to switching to coal (last week) I burned a creosote burning log, I believe that all the creosote fell down chimney and cloged the inlet of chimney pipe connection. When I inspected chimney from top it looked clean and spotless, all debri was down at bottom!
Loaded it up at 10am and it has burning great as of 8pm without touching it, 78deg in basement and 72-74 threwout house in less than 6hrs!! What a relief!! I have noticed I need to keep MPD open, if I close it off 3/4 it starts to dwindle down. THX for all your help forum followers!!
PS- I will post a pick soon
PS- After shaking down, what is better- digging iron under coal bed area to relieve dust formation or from top? Seems to work well underneath.