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 Spark Plug Turns Black, Help me tune up my ride
 
aharryph
post Apr 7 2008, 11:02 AM
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Hi,

Anybody here can guide me why my spark plug in the 3 cylinders turns black (dry like charcoal) while the other cylinder does not? I already tried swapping the spark plugs from other cylinders but the results are the same. It seems that the first cylinder burns the fuel better than the other 3. What is the probable cause and how to tune this up.

Thanks.
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EMC 3000gt
post Apr 7 2008, 11:58 PM
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I would start with a compression test.
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