Emissions and Exhaust Systems
Head Gaskets and Valve Covers
Mufflers and Tailpipes
Nissan Stanza
Why does your Nissan Stanza Blow GreyishBlack smoke out of the exhaust pipe?
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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