First off the car is a 95 camaro with a 3.4 v6. The car had been acting funny with the temp gauge goin up then back to the center so I didnt drive it much then I gotta flat tire. So it sat for about a month or so then when I moved it a couple of feet to put the tire on it started fine and seemed to idle fine. Left it run for a few min then put the tire on went to start it again and now it wont stay running with out my foot on the gas but is very rough and is blowin a white smoke from below the middle of the car. I didnt run it but 30 seconds and tried again later with the same results. Seems like a blown head gasket but not sure any advice or help would be greatly appreciated. Thanks guys.