So, we bought this vehicle approximately 8 days ago. It originally
idled a bit rough but drove pretty smoothly. Well, the other day it
starts running REALLY rough,puffing alot of thick black smoke out of
the exhaust and clearly overheating. It lost all power and died as we
were trying to get off the highway and had to push it into a gas
station parking lot and let it sit for about 40 minutes. There was
still coolant in it. We added water and once it cooled it started back
up. Getting back onto the freeway it started jerking and sputtering and
then lost all power what so ever. Any idea whats goin' on??? Please
help!