Soot in throttle body, Runs perfectly Options

[oakdalecurtis]

Just curious, have 76 2.0, stock except for Crane Fireball EE, runs flawlessly, just had valves done. I had cleaned the throttle body a few years ago, just noticed, while air cleaner was off, a good layer of soot on throttle plate and inside throttle body. Is this indicative of anything?

[JamesM]

Just curious, have 76 2.0, stock except for Crane Fireball EE, runs flawlessly, just had valves done. I had cleaned the throttle body a few years ago, just noticed, while air cleaner was off, a good layer of soot on throttle plate and inside throttle body. Is this indicative of anything?

75-76 cars the crank case vents into the air box just before the throttle plate so oil vapor, blow by gasses, etc are all getting sucked through the throttle body. Cant say for sure if that is what is going on, but I wouldn't expect the throttle plate to clean and shiny on the late cars.