I just changed the battery in my 1997 Blazer....it has been sitting in my driveway on a slant for about 5 days counting today. After I changed the battery and started it up it was a lil shaky and then smoke started pouring out of the exhaust. Anyone know what's up with that?

 

What color is the smoke?

White smoke (typically) = burning coolant, bluish smoke = burning oil, black smoke = overly rich fuel mixture.