Zippy I have not experienced the racing engine situation you described. I have seen the engine jump out of EV mode while stopped at light (after highway driving) for no reason as Anton stated. I do have some questions, you stated "when braking" do you mean when braking aggressively or any kind of braking and occuring sometimes or all the time while braking? I have had non-hybrid vehicles which have accelerated while braking aggressively.