FWIW, my '85 has the single TPS and when it wasn't working I couldn't
achieve idle.  My rpm was somewhere between 2,000 and sometimes 3,000
with my foot off the accelerator.  Getting that switch to "make" at idle
brought things back to normal.

Mike

Michael Elliott wrote:
> Hi Mike, both the full throttle switch and the idle switch connect to
> the same ECU pin (4) and they both ground it. So if the idle position
> switch turns off the fuel, per Bentley, how does the ECU know to go into
> open loop? That's the question. All it knows from the two switches is
> that the throttle is between WOT and idle, but it can't tell WOT from idle.
>