These are the only pics I have around of a UIM/LIM cleaning. A few steps have been skipped, but the general idea is here. Hopefully, this will give you some idea of what to expect.

I've never tried spraying water into the UIM but it is used in water injection systems. If the water isn't "poured" into the engine it shouldn't hurt to spray a little into the intake. If you put too much in I think it would ping.

Quote:
Originally posted by Ghosst:

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 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.


98 Contour / 99 ZX2 HS