Tackled the diaphragm this weekend. Once again mud proved to be the ultimate resource with a couple of great threads I found on replacement for a 3B diaphragm.
Here is the governor assembly - one screw is partially out since after I started figured I better take some pictures...
With the cover off. Some folks removed the EDIC completely or the actuator but a lot did it with everything still in place. Figured I would start out this way and then remove if needed.
I cleaned some gunk out of the end but it was not as bad as I thought it would be.
Now for the fun part - I chose to remove the cotter key and washer rather than fight with the 8mm nut on the other side. Small needle nose pliers are key for this. Some folks recommended cutting the old one to get access for removal but I figured I was better off not destroying it so I would get some practice for putting the new one back in.
Success! Definitely worn and time for replacement
Got the new one in with only having the washer fall off twice. Once inside the assembly which I pulled out with a magnet and then on the ground that took 15 min to find. Minus time searching for the washer total time about an hour. Fired right up and idle was back to 700 rpm or so - success!!
I also fixed the drivers side mirror and brake lights so I am now at least legal to drive as soon as I have time to register it. One step at a time...