Thanks for the speedy reply ehroof. I think it is pretty lean now, at first I was running it at 2-1/2 turns out on the HSN, last I had leaned it out to about 3-1/2 turns and it still happening, should I lean it out even more or do you think it might be a more serios problem w/ the motor. I keep burning glow plugs, supply running low lol. Could it be the fuel, I'm using Byrons 30%, I probably should be using 20% but when I first bought the truck, I picked up some fuel from Brooklyn Hobbies and since I had no clue what I was getting he just gave me 30%, I found out later that 20% is recommended, so I hate to throw away a half a gallon which I have left, but I will if it's really bad for the motor. I don't know, what do you think.