Well, it may be then that my hall sensor has at least a bad connection. A short run with it off made no difference. Reconnected, actually improved matters, briefly. Throttle response was certainly better.
The distributor mounted connection feels very unstable.


85 WR quattro
90 V8 Silver, 91 V8 Black, 93 V8 Lago
93 100e quattro V6. Titan, i think