It is good to have a working throttle switch but I doubt it will fully
solve your symptoms. It primarily is needed to tell the ECU and idle
control unit that you foot is off the gas. Unless the switch is sticking
closed it won't come into play just cruising down the road under power.
To test that it isn't sticking and thus causing a problem while cruising
you can unplug the connector to it and see if the cruising problem
clears up.

Mark

Gregory Smith wrote:
> A further update to my problem.  Turns out the bad distributor harness
> wiring, while truly frightening, was not the cause of this problem I was
> having.  Driving it the following day revealed the problem was still
> there, and getting worse.
>
> I downloaded the Digifant troubleshooting pages following a link on
> VanCafe, discovering later they're also in my Bentley.  Ran through the
> tests, checks and adjustments to find my Throttle Position Switch not
> closing when the throttle closed.  First checked via human ear, then
> with VOM.  Adjusted and retested to ensure switch closure with throttle.
> Not clear if something wore out of adjustment or what there, I have not
> touched it previously in a few years of ownership.
>
> Next day (yesterday) driving revealed no symptoms.  I'm not 100% sure of
> this fix yet, but compared to the night before (had to pull over twice
> because of the problem) it's 100% better at least.  Will report back
> later today.
>