Emissions and Exhaust Systems
Head Gaskets and Valve Covers
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Nissan Stanza

Why does your Nissan Stanza Blow GreyishBlack smoke out of the exhaust pipe?

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Wiki User
2011-09-14 00:17:17

Sounds to me like gas and or oil smoke. When checking the oil is

there a noticable amount gone? If in your area there is a emissions

requirement that can tell you a lot about how much actual gas is

NOT being burned inside the engine. I would look at major tune up,

oil change, and o/2 sensor. Good Luck.

"Answer_#_2" id="Answer_#_2">Answer # 2

Greyish black smoke is a sign of worn out piston rings

White smoke is a sign of leaky/busted head gasket

Blueish grey smoke is a sign of bad PVC valve, O2 sensor or

both


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