hey thanks tried that as wel my high speed is curently set at 4 1/2 now i ahve always had this problem since i pulled my jato out of the box 3yr ago after breakin in never had a good tune i ahve also herd what u said bout the traxxas fuel but i never had a problem with my nitro sport .15 or my rustler with a 2.5 n i used 20% in both i also havent had much time to fool with my jato i coach lil leage football which takes up much of my time i have only ran a lil over a gallon af fuel thru this jato can the fuel go bad i had it stored in a cool dry place with the top on off of the floor