How are determining this...ie, what is the end result? Are the temps higher than what you're setting them for? Pellets not burning properly? A little more info might help.
Pellet flow is determined by the control board, which cycles the auger motor every so often. I believe it's 18 second intervals. How old is the FEC100 and what version control board is it? When first turned on, the version number is displayed...V46, V78, etc
If you can't get resolution via the forum, call Cookshack customer service during normal business hours. Bill or Tony can offer you expert advise. They do not monitor these forums.
Good luck.