re. Arrrrrrrrgh! Intermittent dead 90q ignition (long)

[Ben Swann]

[I've been having intermittent ignition problems with my 89 90q with 214000
miles for over a month now.

The symptoms/problem are as follows.  While driving the car, or more
correctly,
while running the car it will sometimes just lose ignition, as if someone
had
just turned off the key.  The tach drops to zero. <snip>

Am I missing something?  Where else should I look?  Is it possible that the
keyed ignition switch is failing, though it still performs all other
functions
it should?

<snip>

TIA,

Nathan Engelbert
89 90q]

Ignition Switch?  Don't laugh - BTDT after all of the above, and checking
out some of the subsequent excellent suggestions provided by other listers.