I just cleaned the throttle body, off car. The guide was super useful, thank you very much for the detailed description. helped a lot.
I found that the throttle body itself wasn't too bad in terms of carbon deposit. However, the intake manifold, directly after the throttle body is completely covered in carbon. Is this a problem? It's a thin layer of carbon all over the inlet manifold, no blockages however. Only about 1mm thin.
