My 85 GSE-SL will not idle. I suspect the throttle position sensor but do not know. On the left side of the engine there are three small round parts with vacuum hoses attached to one end and wiring to the other. the middle one seems to have leaked some kind of rubbery black junk out of it and since the wiring connects with a small module on the front of the throttle linkage, I suspect that I may have found my problem -- just don't know for sure. If that is the problem, where can a replacement be found? Thanks