Hi:

I've been trying to figure out what's going on with a Mercury Sable 89
car...where after driving it for a while smoke had started to emmit
from the back of the car.

It either looks like it came from the gas line (where you put in the
gas)...or the exhaust pipe...after I looked under the car I didn't see
anything that looked like it would cause it to occure...but before this
happened the car had a chugging sound.

Thanks in advanced for any response.

MC