Turnigy trackstar 120a turbo esc issue?

[Stickygeko]

Hi everyone,


Im currently running a Turnigy trackstar 120a turbo esc with an Orca rx2 8.5t - I used to run the SP reventon R with SP 8.5t

Recently I have been losing control of my car... fail safe is set and working.
However mid race the car shoots off full throttle and i cant stop it.

this doesnt happen every race... but is happening more frequently... i set the dead zone to a high level which initially seemed to help.. but back to square 1

and ideas why this is happening?

all wires are connected, non are touching etc, all batteries are ok