Originally posted by Hondaman
The cleaners won't clean your throttle body by the butterfly, there is no way it can go against the stream of incoming air. The cleaner will only clean your injectors and valves. You may have to take the throttle body and intake manifold right off the engine to give it a good cleaning. Other wise you can run your engine and spray little bits of carb cleaner in the throttle body, but that can seriously mess with your O2 sensor and cat converter.
They make intake cleaners specially formulated to not hurt O2 or the cat. I took mine off and cleaned it, but have had good luck cleaning it on the car as well - with the engine off, I just pry open the throttle and spray some cleaner on a towel and wipe off all the crud. Works much better than flooding your motor with cleaner. I also learned the hard way that you shouldn't clean the IAC valve - I had to buy a new one as well.
