Re: 96 F3 Idle creeps up to 5k
See Ian's [bottom of the photo] spigots? Once assembled and running, spray contact cleaner or brake clean at those air entry points. Lean air wants to peak and shout off kind of runs out of gas but doesn't.
If you did clean the carbs like the photo, look at the brass throttle plates in the carb body. Assembled, you have the CV slide to lift and see of the brass throttle plates are equal or one is higher than the others. That's a high rev [causing] plate needing to be screwed back down even, or the sync will pickup who is pulling the most vacuum under that plate.
See the 4 plungers at the top left corner of the photo? Those need to have the rubber insert so those plungers are sent home and do not leak. Those too may cause a rev interference where an idle cable is no help.