I'm new to RC and I have a problem with my Losi Xcelerion brushless motor which has me stumped.

The car accelerates in a burst for about 20 metres and then dies off. If I release the throttle then come back on I get another burst then it again dies off. The car will only accelerate in short bursts.

I am running 2s lipo and I have tried different batteries, this has not helped.
I have checked the programming of the ESC and all is set correctly there. I have checked the settings on the radio and they seem all as they should be.

Does anyone have any ideas?

Thanks.