My idle has often--like 3/4 of the time--up as high as 1700, usually
1200 and sometimes ranging up and down a few hundred. It's been
happening since the fall, and I thought for a while that it might be
related to the cold weather. But, it didn't improve when the weather
warmed up.

I'll skip what mechanical stuff I took off the engine and cleaned,
but it was everything connected with air intake. I cleaned and lubed
the throttle stuff.

Today, I had an hour or so to deal with the problem (and another hour
on the westy turn signals, but that's another post) and I went around
the engine compartment, unplugging and replugging every connector I
could find that I hadn't already checked three or four times until I
felt the connections were clean. The connections were the temp I and
temp II by the thermostat (it's a 2.1, obviously) and the AFM cable
connectors both at the ACM and the "anti-bucking" pigtail halfway
down the cable at what once was the original connector.

That did it. Idle at 1000 today, for the first time in many months.

Jim