I'm looking into cleaning my throttle body (2000 2.4L w/ 108K, mildly erratic idles, p1400 code about once a month). I was wondering if anyone did this before and could offer me some tips. For instance, is it true that there is coolant or water running to the TB and I would have to flush whatever system when done if the TB is removed from the car? How effective are cleanings if the TB is left attached and just cleaned while "on" the car? Also, are there any sensors protruding into the TB? Any advice would be greatly appreciated.