When I say hold the brake tires don't move or the car. That is brake stall. If the tires move the test won't be accurate. Flash stall is at idle just tromp the throttle and watch the tach . That is flash stall. Weather you are rolling or not at idle when floored the tach reading is flash stall. Here I am flash stalling and trying to brake stall but could not hole the car back so brake stall is not accurate. It just started pushing the front tires.