ok i have an rc10 gt and i ran it all winter and it ran beautifaly. i dont no why it just did i barley tuned it. so then it started to warm up and it ran a little different, but i figured id have to tune it cuz they run differentt in winter and stuff. so i started to tune it cuz it was just stalling and stalling, then it go to a point where i had to prime it every time and it idle and about half throttle! then i figured there was sumthing wrong. so i out high speed back to 2 1/2