I removed most of the linkage, cleaned and greased it. The link bars weren't easy to pry off the ball ends. I didn't get the link bar off that's next to the throttle body because it started to bend. It appears to be spring loaded. I'll clean it as best I can and re-assemble tomorrow.

I disconnected the plug to the ICV while it was running and the idle dropped to under 1k until I restarted the engine. Seems to work fine.

I checked resistance on the micro switch with a voltmeter and it operated correctly. I noticed there is no adjustment on the switch body as it's held on a pin and screwed to the bracket. It's cable sheath on the connector mounted at the firewall side of the head was hard and a little frayed likely from the heat. The switch connector seems ok too and no obstructions to the switch.

I found this link for more info: High Idle 300E -88 (Have preformed search)

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