My car was running fine, then i replaced my upper radiator hose. when i pulled the old one off, it was very deteriorated, so i put the new one on, i took a small cruise, then to get a burger. when i got outta the drive-thru burger joint i started home and noticed it was cutting out on acceleration a little. so i turned the car off. then 10 minutes later i went and started it and it started shooting white smoke, what happened please?