Marshall:

I'll second the Hall sender in the distributor, especially if any
part of the dying seem like a switch is just turning off, RPM
just drops to zero, etc.  That was my experience back in
December when my Hall sender was failing.  Good luck and let
us know how it turns out.

                                        Richard A. Jones
                                        Boulder, Colorado
                                        '81 Vanagon   Mr Bus
                                        '87 Syncro Westy   El Jefe