So as I enumerated in a previous thread, I had been having a problem with the engine revving about 500 rpm between upshifts. It seemed like the cable would bind, and then release after a few seconds, only when the car was in gear. I couldn't figure it out, and couldn't reproduce it in neutral.

So I used the little dials on the throttle cable and the cruise control cable to give both of them more slack. For the first few miles, everything seems good. Then, it goes back to it's old behaviour, and when I check the slack again, it seems to have disappeared.

There are 2 springs on each of the dials - is it possible these are too weak or too strong, and or that the dials themselves are too weak to maintain the proper level of slack?