Okay, so here's some of the photos from the TB cleaning day at Martin's. One thing to keep in mind is that Martin's car only has 54,000 miles on it (87,000 Km) so it's still fairly new.
1) UIM removed, view of the dirty LIM still installed on the engine.
2) Close-up view of the dirty lower intake tubes.
3) side view of the LIM, showing the closed secondary butterfly valves. Before cleaning these appear to be black, but are coated with a thick layer of carbon and fuel.
4) Good shot of the UIM, before cleaning. Notice the thick deposits of carbon lining the shorter (larger) secondary runners as compared to the slightly cleaner primary runners.
5) Close up of one pair of runners. You can really see the hard carbon deposits here, flaking off around the mating surface.
6) Another shot of the lower intake, showing before and after cleaning with a brass brush and a can of throttle body cleaner. The butterflies are actually brass.
