my 03 350z had a check engine light come on and i took it to the dealership....they said it was low 2 quarts and that i had a leaking head gasket...but since it took there i noticed my car smokes when i first start it and when i gas it while parked it shoots out smoke that seems to evaporate not lingre and when i am driving and punch it i notice a slight cloud where i first punched at.....any idea what it could be and a place for me to start trouble shooting from?????

 

how much smoke you are talking about?
mine does it too, but mine is normal, over here is really cold so.

 

what color smoke?

 

+1

 

what color smoke?

 

Green!!!

 

White smoke water
blue smoke oil
black smoke fuel

Just from the little bit you described sounds like a head gasket

 

Sounds like normal exhaust smoke. Especially if it's colder outside it will happen. If it's burning coolant the smoke will linger and have a very distinctive smell.

 

Coolant smells really sweet, like candy. leaky gasket possibly, if it was blown you would know it. The smoke doesn't stop a little white smoke on hard acceleration is normal. Puffing it out when you start it up is another story.

2 quarts low, if it is colder where you live i would suggest maybe running 20w50. It will cut down on how much your engine burns. (of course full synthetic)