<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by SteveF:
Thanks guys. Almost 2 hours into it and temps are holding steady at around 230. Thats with the bottom vents closed and the top fully open. </div></BLOCKQUOTE>
Your door might need a little reshaping to get a better seal, or you might have a little gapping in the fit of the top/middle/lid sections. Also, keep in mind that direct sunshine and wind direction/proximity to the "unintended" vent locations are things that can keep temps a little higher as well. If the wind changes and starts to blow AWAY from where ever your cooker is getting air, you should see the temps go down...and you'll need to open a vent a bit to keep the fire from going out.
The worst thing about charcoal is how slow it is to get the temp to go back DOWN to where you want it. It's much easier to catch temps coming up by shutting the vents back when you're 30-50 degrees shy of where you want to be cooking at.
When you're not cooking, and there's little wind and lots of light, you can toss in more wood for a little extra smoke and look for leaks.