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Drivers-Side Plugs Black

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Drivers-Side Plugs Black

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Jun 27, 2012 | 09:56 PM

#1

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From: Huntsville, AL

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Drivers-Side Plugs Black

I pulled out my plugs for a header swap and all the plugs on the driver's side are black with soot. The passenger side looks fine. They probably have less than 10k on them. All the plugs looked fine the last time I changed them. Is it probably running rich on that bank?

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Jun 27, 2012 | 10:01 PM

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From: Beaufort, SC

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Exhaust leak or bad o2 sensors etc.

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Jun 28, 2012 | 08:03 AM

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From: Huntsville, AL

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I'm thinking it could be the O2's since I've got 130k and it is an entire side.

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Jun 30, 2012 | 09:28 AM

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most probably O2 sensors. mine were literally painted black when my O2s went bad and they had few miles on them. is it throwing codes? try swapping O2 sensor sides and see if that changes the plugs on the other side.

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Jun 30, 2012 | 11:45 AM

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Yup, like they said.. A bad O2 could definitely cause this.

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drivers, ls2, plugs, rich, side

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