I started my break in process a little while ago and it seems like it was idling (rmping? motor sounded like it was working very hard) very high. I thought maybe that was normal for the break in seeing as how Ive never had a nitro car. I know its supposed to run at a rich setting but im not sure about how its supposed to idle. So I was running the car blipping it and all that mess. It seemed to run for a few minutes then cut off. Temp was up to 248 F at one point. Any suggestions?

I just went outside and started up the motor and just let it idle. It cut off after about 30 seconds.