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I can't figure this one out. I have a 98 Contour with only 26K and a v-6. It seems to start hard when it's hot, otherwise it seems to run perfrectly. When it starts hard its clearly flooded, blows a puff of black smoke and stinks like gas. The spark plugs are all black in color and wet. Checked the fuel pressure regulator, works perfect good fuel pressures, hold vacuum. Replaced plugs, wires, fuel filter, air filter. Thought it might be leaky injectors flooding the engine but ALL of them? Noticed that the coolant tempature sensor only has one wire, my parts diagram shows two for the 4 cylinder but doesn't mention the v-6. Assuming this is correct. Now the real kicker, the other day on the interstate I got two fault codes being left and right banks too lean. Immediately thought of the O2 sensor but how can they both fail at the same time? The car still runs perfect but now there is a check engine light. Need advice! I really at a loss for what to look at next. HELP