[s-cars] S-CAR-List Digest, Vol 58, Issue 28

[LL - NY]

The throttle dashpots were used on carburated cars to prevent the throttle
plate from slamming shut, as the last slug of accelerated air tended to
carry excessive fuel (because it was essentially choked) down the intake
tract, thus raising HC emissions. Why they'd be used on FI cars, I don't
know, because a idle switch could be used to shut off or modulate fuel to
the injectors, even on CIS systems.

LL - NY sadly able to remember carburation

On 8/14/08, Steve Voit <stevevoit at comcast.net> wrote:
>
> Hi Mike:
> The dashpot controls used to be very important in the 70's 80's when
> pollution control systems were primitive.  My feeling is that if the car
> seems to run right w/o it, then it is prolly intended to make deceleration
> more consistent for emission certification purposes.
> Steve
> Seattle
>
>
> Message: 2
> Date: Wed, 13 Aug 2008 14:47:19 -0400
> From: Mike Fitton <rfitton at vt.edu>
> Subject: [s-cars] throttle dashpot...purpose?
> To: s-car-list <s-car-list at audifans.com>
> Message-ID: <48A32C37.9090403 at vt.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Seriously...what's the point of slowing down the last few degrees of
> throttle closing?  I took it off to see what would happen and I can't
> tell any difference.
>
> -Cheers!
> Mike
>
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