Hi guys, I bought a 93 T100 4x4 5sp back at the end of December, and finally got around to doing some basic maintenance on it today (Maybe that says a lot about what kind of mechanic I am, but lets not go there). Anyway, I was changing out the spark plugs and broke off part of some plastic *thingy*...there are three of them in a line just behind the EGR valve with lots of wires and hoses connected to them, three different colors (orange blue and green). I broke a little black cylinder off the bottom of the one nereast the front of the truck (no digicam=no pics, sorry). Went for a little cruise after I was finished and everything seemed to run fine so I figure no harm done, but I just wanted to ask the experts. Can somebody tell me what these things are, and what that little black part I broke off is? Should I be replacing it, and is it expensive? Otherwise the truck has been great so far!