I think I may have blown a head gasket. I have white smoke coming out the exhaust along with some sort of liquid (maybe condensation). the engine will only turn on for 3 or 4 seconds if i dont rev the engine. Otherwise the engine cuts off. If it is a blown head gasket how much does that cost to get fixed? is this something that can be fixed at home? what else could it be besided a blown headgasket? Please help!