[alfa] Re: Re: Spica Idle adjust O-ring

["Dean W. Cains" <dwc@xxxxxx>]

Hi John:

I think the functioning of the idle o-ring is at least partially determined 
by the tightness of the throttle plates within the throttle bodies.  Both 
of those parts can wear, as well as the shafts and shaft bushings, and it 
doesn't take much of an air leak to supply the idle needs of the 
engine.  So, if the majority of the idle air is coming through the o-ring, 
as it's supposed to, it works pretty well.  I cut 1/2" x 2" strips of legal 
pad paper, and use them as feeler gauges to adjust the throttle plate to 
body clearance, and that seems to get them close enough.  That's the ideal 
case, and while it's nice when that happens, it won't make any difference 
with the throttles open, and that's where they should be most of the time 
in an Alfa.

Regards,

Dean

At 06:26 PM 11/24/2003, you wrote:

> Date: Mon, 24 Nov 2003 10:51:30 -0600
> From: <roadtrip999@domain.elided>
> Subject: [alfa] Re: Spica Idle adjust O-ring
>
> The SPICA idle air adjustment (idle speed) is notorious for being almost
> worthless. You're old ring is probably rock hard and britte, but don't expect
> a new O-Ring to do much good. Usually the engines idle slow (700 rpm) and
> cannot be adjusted upward very much, if at all, using the standard adjuster.
> Just a poor Rube-Goldberg design.
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