So I have a nitro RC car called XTM XT2 that has 24.7 engine I think, and I used traxxas fuel when I first got the car and when I ran out I bought XTM fuel which made the car much faster and more high pitched louder like it would make the sound of a car stuck in hole while pushing the throttle to the fullest, like it would be that high. Now what I didn't mention is that I didn't tune the RC car when I got the new fuel. Should I tune it and if so what side should I choose lean or rich??? Will tuning fix this problem you think?!? Thanks!