i have a 99 gtp...today i was driving and noticed that the car started to jerk...it seemed like when i stopped and then accelerated it felt like it was stalling but then once it got going it went away and would happen every stop and go...the servece engine light came one when i parked it and smoke came out from under the hood...i went out an hour later and started it up abd left it idle,,tons of white smoke came from the exaust pipes....any one have any ideas what happend...only mode of transportation? help would be greatly appreciated