I've got an issue (one of many) where when the car is Declutched at most any speed over 5mph, the rpm drop to like 4-600 rev up to 1200, then back down and up and down a few swings then settles out at idle. During this event, ipw doubles on the downswing and goes lean while rpm swinging up.
Also, if I'm backing out of the driveway (coasting downhill) Declutched, it will do the same thing once i hit 3-4 mph, unprovoked (no throttle blips, just while idle), occasionally leading to a stall.
I'm using $88