Hey scotty the mifire in cylinder number one and when i floor it sometimes the check engine light flashes dont kw if its carbon or bad motor still bucks when stopping run really good on the highway and black corbon like material on ends of plugs after puting in cleaner smells like burned gas on plugs tho its my daily dnt need it to go down and oil is dark after 500 miles out in oil treatment 500 miles ago need help

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No. 1-1
ScottyKilmer
ScottyKilmer

Editor

do a wet and dry compression test of the engine first, that will show if #1 cylinder is just worn out inside. Start there, and pray it's bad spark plug, ignition coil, or fuel injector