TwinTurbo.NET: Nissan 300ZX forum - Black sludge coming from exhaust. Seems to be running rich.
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Subject Black sludge coming from exhaust. Seems to be running rich.
     
Posted by z32z on October 05, 2011 at 10:33 PM
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Message Could this be a result from bad O2 sensor. I had a (disco light ) air/fuel gauge meter I hooked up just to see what it would show and it just bounces all over the place from lean to rich. I know these meters are not worth a crap but I figured it might give a remote reading.

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