smoke upon start up

[Vincenzo Basile]

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Hi list
I really need someone's help.Upon start up these past few days i started no=
ticing a little black smoke,thought nothing of it.Until today,after work I =
started it up and it smoked up the whole parking lot I mean smoke everywher=
e ,there was a nasty smell too like something is burning almost like rubber=
,there was no white smoke and smell  of  antifreeze so I guess I could rule=
 out head gasket.As I continue to drive the car it went away ,but not that =
smell,whats weird is the car seems to run fine.I tried pulling codes and on=
ly got the O2 sensor.If theres is any body that could point me in the right=
 direction I would really appreciate.,
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