TwinTurbo.NET: Nissan 300ZX forum - Have a wideband?
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Subject Have a wideband?
     
Posted by -Grimm- on April 23, 2014 at 12:18 PM
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In Reply To The black soot is killing me!! posted by eriksu9 on April 23, 2014 at 10:07 AM
     
Message Black 'soot' is unburned fuel (high hydrocarbons), which is going to be due to the lack of catalytic converters and possibly a rich tune.

You can pull your plugs and inspect, they may indicate you are running a bit rich.

What heat range are your plugs, and what base timing are you running?

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1992 300ZX NA 5 Sp (Dead)
1990 300ZX NA Auto 2+2 (Dead)
1990 300ZX TT 5 Sp (Building)
2004 G35 Sport 6MT (DD)

     
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