Car blows white smoke from tail pipe only some times

SOURCE: 94 Toyota Camry Smokes & hesitates to start in the AM

valve seals could be worn out letting oil get into the combustion chamber making that white smoke.if you have alot of miles of miles on your engine it just be time for a rebuild or replacement

SOURCE: 02 highlander 4cyl I park it for 2 days when I go

Depending on the color of the smoke.....

Blue smoke = Burnt oil (Valve steam oilseals)
To fix you need them replaced can be done without removing the head.

Black smoke = Too much fuel (Running rich)
Tune-up replace air filter.

If its a turbo it could be the seals in the turbo but i doubt it as it stops smoking.
Hope this helps , Please rate me as feedback does help.

SOURCE: white smoke coming out of the tail pipe after

White smoke continuously blowing out from the tail pipe ? If it is only at the cold position it is normal, if it is always coming out it means oil consumed & compression is week. spark plug frequently needed ? If plug frequently shorted u need to overhaul or need to add oil treatment for increase viscosity.

SOURCE: Blowing white smoke out of tail pipe

unless its cold outside then i hate to say it but your burning coolant which means blown head gasket. sorry...

SOURCE: I think my car blew its head gasket,but theirs no

If I were you I would be checking the radiator for blockages! ;-)