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05-19-2019, 09:00 PM
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Registered User
Join Date: Apr 2014
Location: detroit mi
Posts: 208
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spark plug deposits
My unknown size sbc has been running poor lots of backfiring and real hard starting so I changed the plugs. All my plugs looked similar orange black color with no heavy deposits except #8 cylinder had a big orange deposit on the end. What is it and what would cause it.
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