[supra8990]

I know there are many posts about BHG but i have looked and i cant find anyone with this problem. ok i start the car it starts great no smoke perfect, i drive it its fine if i dont get on it, when it warms up and i start to get on it, it will puff some white smoke when i stop and drop the rpm's only when i stop, it does not smoke all the time? can anyone help me? not losing coolant either, oil is not milky