I noticed when I was changing my timing the other day that when I disconnected the ESC (Electronic Spark Control) wire located in the center console that the engine seemed to idle better (more consistent sounding and higher rpm with no sputtering). I was curious what is bypassed when you disconnect this wire? I was thinking there still might be some sensor that is sending the ecu wrong data that could be affecting the idle. Maybe TPS??

Ed also mentioned a sensor that I was curious about on another thread:

"I bolted mine to the block, using the screw which holds the (now useless and only filling a hole) cam position sensor (under the exhaust man on pssgr side and best accessed in the vehicle by going thru the pssgr's wheelwell)."

I looked and it appears that I do have a wire hooked into a sensor in that location. I was assuming it was a knock sensor, but now I'm not sure.