White smoke is generally anti freeze burning, keep an eye on the coolant level. The coolant could be seaping into the intake manifold, doubt if its a head gasket.
Tom
> I've got a 2001 Maxima with 17000 miles on it. Needless to say it
> doesn't get driven very much. Yesterday I took it out for the first time
> in a while and drove about 30 minutes on the interstate to a friends
> house for Easter. Drove back and put the car in the garage. Started it
> today and a large puff of smoke came out of the tail pipe. Never did that
> before. What could this be from?
>