298 Rustler????

[neweuser]

My girl has a nitro rustler, when it's cold it runs good, but when you do two good high speed passes it just boggs and dies. the temps get about 270-298 at the highest. I can see air going backwards thru the fuel tube and it won't start again until it gets cooler. then you can do about one good pass and it dies...then it won't start at all. the idle barely can be tuned down either, anyone knwo whats up with it???????????? thanks!