I pulled my plugs to check color/cond . All looked great and clean except for #8. I swapped out for a new plug gapped at .35 and drove 10miles. Here is the result. What could be causing this? fresh motor with 300 miles and brand new ford racing heads. PCV is functioning.
Sorry for the focus- I cant figure out how to work the digi cam You get the idea through. Porcelin is blackened. Smell is bland not like raw fuel or oil. Nit plug seems to be wet.
Sorry for the focus- I cant figure out how to work the digi cam