a month ago or so, we were driving the sunfire, and it overheated a little, then lost all power. the car starts right up, but has absolutly no power at all and will barely get over 25 mph we did have to replace the head gasket as it blew, and have had no problems for a year until now. there is no wtaer in the oil, or anything like that. Please help if anyone has any ideas

 

is it possible the head is cracked?

 

Or you could have a miss in one of the cylinder's. Or it might just need a tune up, but yeah you could have a cracked head as well.