Here is what is happening. I started a fire tonight because it is sopposed to get down to 42 tonight, or it seemed like a good reason to use my stove. I got the fire going easily, got the stove griddle up to temp with 20 minutes at the 55o degree mark, shut down the damper and had the intake at about 1/2 way (2002 or 03 model VC resolute) fire going well. minimal flame, lots of coal. Secondary burn kicking in very sporatically. It is like the smoke is building and then igniting in short bursts. But I notice that with the puffs it is puffing out smoke from I believe the door and the griddle. The griddle temp is still at 500. Do I not have enough draft? Should the secondary burn be constant? What do you think? Do I have a leak? Elk sealed it up as tight as one could. What is the deal with the smoke puffs?