What would cause spark plugs to be rather blackened? Plugs for cylinders 1
through 6 were very black; this color was not oil either. They smelled fine
also. Would this be considered a 'rich' running condition? I have changed
alot of plugs in my Dak and have never seen them this color. I did clean the
TB with Gumout's Throttle Body and Intake cleaner right before I looked
at/pulled the plugs, so I wonder if this perhaps the excess burnoff coated
the plugs?
Kyle
93 Dakota 4x4 V6
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