Re: The wonders of the WOT switch

[quk@isham-research.demon.co.uk (Phil Payne)]

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
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