RE: The wonders of the WOT switch

["Dan Sinclair" <sinclair@prospro.com>]

Well, I went down the the parking lot and popped my hood to check this out,
and I think I know what your describing.  The throttle cable hooks into a
black plastic rocker of sorts, and that is attached to a vertical
pivot/linkage that goes down into the throttle body.  With the car off,
ignition off, you can twist the linkage and let go and observe the dampening
or "resistance" effect of the "dashpot" as you call it, but where is it?  Is
it on the underside of the throttle body?  On the top, there's just the
linkage.  You can hear the Closed Throttle Position switch "click" as soon
as you move the linkage away from rest, and I can hear it "click" again when
the linkage returns to rest, but can't figure out where the "resistance" on
the return is coming from.  Again, mine doesn't look like the 200/5000 setup
on Scott Mo's web page.

Sorry to pester you boys.  I truly believe that every problem has a cause,
and ultimately, a solution, but this one just keeps escaping me...

-Dan

> In message <36EF6164.46F7C987@nh.ultranet.com> Huw Powell writes:
>
> > I notice on the 87.5 I am chopping up, the WOT switch is part of an
> > integral harness with an idle switch.  So the ecu knows the throttle is
> > closed...
>
> The throttle actuator only moves the throttle valve directly in one
> direction - in the other, the spring returns it to the closed position
> against the actuator or the dashpot, depending on how fast the throttle
> is closing.  If you take your foot off very quickly, the actuator snaps
> back into the rest position and closes the idle switch, but the actual
> valve closes more slowly against the dashpot's resistance.  This
> arrangement gives the ISV time to react.
>
> --
>  Phil Payne
>  Phone: 0385 302803   Fax: 01536 723021
>  (The contents of this post will _NOT_ appear in the UK Newsletter.)
>