Small puff of dark smoke out the tail pipe in the morning! What could this mean?[???]
What would cause oil to get past the valve guides?viney266 said:Depends on the smoke !! Smoke with a blue tint on a high milage engine, may be oil coming past the rings. On start-up it could be oil seeping past the valve guides.
If it is just gray smoke, it is some unburned fuel.
If it has a white wispy appearance it ( this is the most likely ) is water vapor that has collected in the exhaust overnight from condensation.
LOL. Anyway, isn't it true that are cars fuil mixture is controlled by the two O2 sensors in the exhaust header, one before and after the cat? I mean unless you get a bad sensor how would the car ever run anything but a close to perfect mixture?WickedlyFastST said:I know...LOL
running lean would be a puff of white smoke or condensation coolant it could be alot of stuff...get it checked.WickedlyFastST said:I am not EXACTLY sure... but I think your car may be running kinda lean... On Diesels when they gun it and the black smoke pours outta the tailpipe that is burnt fuel... I pretty sure it would be the same for gas engines.