About a couple weeks ago, I bought a used 2009 Nissan Altima. Sometimes, when I start the car, white smoke comes from the exhaust and last about a couple minutes. The car still drives wonderful, though. I have had the car checked out 3 times, and I have even had the oil changed and the professional fuel injection service done about 4 days ago. Each time I got it checked out, I've been told that the car looks perfect, almost like a brand new car. I haven't had a check engine light or any other light come on, yet I still see smoke. I can understand it happening in the morning because it's been sitting overnight. Sometimes, it happens in the afternoon or even at night when starting the car. When I bought the car, it wasn't even cold outside yet. The temperature has started dropping now though, since it's almost October.
I was told once that it may be the head gasket, but when it was checked out, nothing was wrong with the head gasket. I have not been told about any coolant burning off or oil problems; all of that seems to be ok. The car doesn't overheat, either.
I went to a place called Jiffy Lube during the times it was checked out, and I've even called around to every Nissan dealership in town and asked about it. I was thinking about taking it to Nissan today to see if they can do a diagnostic on it.
What could this be? I am a little frustrated because I got rid of my old car so I didn't have to keep paying money to fix it. I really don't want to keep shelling out unnecessary money. Can anyone help?