Excess carbon on plugs - Pontiac GTO Forum
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post #1 of 6 (permalink) Old 12-17-2010, 11:37 AM Thread Starter
 
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Excess carbon on plugs

What are the causes for excess carbon buildup on plugs?
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post #2 of 6 (permalink) Old 12-17-2010, 12:21 PM
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A fuel mixture less than 14.7 to 1 is considered to be a rich mixture and will cause carbon on the plugs,

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post #3 of 6 (permalink) Old 12-17-2010, 11:39 PM
 
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These cars are rich from the factory to be safe. The afr does richen under wot. A tune will fix you up. You might have some weak ignition components causing the mixture to not fully burn. Whens the last time you changed plugs? How many miles?

<-- Guess which ones quicker?.....Nope! Not even close.
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post #4 of 6 (permalink) Old 12-21-2010, 07:27 AM Thread Starter
 
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Just put brand new plugs in it almost 80,000 miles
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post #5 of 6 (permalink) Old 12-21-2010, 08:32 AM
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Garage
It's an anti-global warming feature to keep your carbon footprint down.

2004 Blk/Rd M6
6.3 litre LS1

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post #6 of 6 (permalink) Old 12-21-2010, 09:47 AM
 
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What are the causes for excess carbon buildup on plugs?
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