It took me all of my 4th tank, with many stalls to get it to the point I could keep it running. I had to lean out the needles as well. Believe it or not my needles ended up 1 3/4 out on the low and 2 1/4 out on the high. I ran about 5 tanks through this weekend racing and it ran great with temperatures around 220 degrees. Just be calm and try an hour at a time when adjusting and dial that thing in good!