car keeps cutting out after 2 mins!!!!!

[kitesurfer73]

Was racing last week indoors and after about 2 mins just stopped working seems like power to the the receiver and servo just died i switch esc on/off and there was some power but seem to drain quick again,but only when you turn the steering???
checked battery ok
tx batterys were good voltage
epa on default
and also extra bigger capacitor but still did it......

Have also reset tx and esc...and put new sensor wire in am baffled to wats going on.
Am running a b max,losi combo with bluebird metal servo
and handset is core rc i have already been thro one receiver coz it wasnt binding properly....