I did a beer butt chicken yesterday and everything started out fine I check the temp after about an hour a half and it was only running about 225* I had it just about to medium. so I cranked it to just above medium which is probably higher than I have ever had to have it. long story short I wanted to run the last hour or so on my bird at around 300 or so to crisp it up. I turned it all the way to high and the flame just didnt seem to change much. Highest the temp ever got was about 240*. warm day, no wind? et75 temp probe functioning correctly . plenty of fuel. anyone ever have this problem.