It is probably intended to replace the function of the "accelerator
pump" on carburated engines.  It shot a squirt of gas into the throttle
area when you floored it to prevent stumbling from too lean a mixture.
It provided fuel for the big gulp of air that entered with wide open
throttle. As engine speed increased, so did throttle airflow, bernoule
effect and gas flow through the jets.  Without the extra enrichment the
engine would gasp on a lean mixture.
On Wednesday, August 4, 2004, at 07:20  PM, Automatic digest processor
wrote:

> Date:    Wed, 4 Aug 2004 16:36:47 -0400
> From:    Ken Lewis <kdlewis_wasting_time@ACCESS4LESS.NET>
> Subject: Re: ECU and Throttle Question
>
> Here's my theory FWIW;  the thinking behind the activation of the full
> throttle switch means you have "floor-boarded it" i.e. you need all
> she's
> got plus some. Looking at the O2 sensor monitor gadget (
> http://neksiwel.20m.com/photo5.html ) on my dash the FI system has
> stopped
> toggling the mixture rich-lean-rich-lean and is now pegged in the rich
> area.
> How much richer I do not know.
>
> Ken