[G.M.]

To me they are almost perfect. I go by the black showing on the flat surface looking at you. It don't sound like you ran it far. I would drive at least 20 miles before checking. Just the two front plugs will give you a reading of both main jets. I have adjustable jets so I can tune it exactly to what I want. I like that surface cleaner with black spots. As long as the black don't build to a thicker carbon deposit what you have is very slighty rich. G.M.