My 93 Caprice gives out a white puff of smoke out the tail pipe only when I start the car. This just started 3 weeks ago, What could it be?

My 93 Caprice gives out a white puff of smoke out the tail pipe only when I start the car. This just started 3 weeks ago, What could it be?

usually the white smoke is antifreeze...has the engine overheated ? if so and your antifreeze needs filling every so often it could be the head gasket or someother leak into the combustion chamber..

remove spark plugs look for a very white plug tip..