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Re: Question about fuel pump causing rich mixture at idle.

To: Fred Thomas <vafred@erols.com>
Subject: Re: Question about fuel pump causing rich mixture at idle.
From: Joe Curry <Spitlist@gte.net>
Date: Fri, 15 Nov 2002 15:41:32 -0700
Fred,
I expect that your problem was caused by the excess pressure forcing raw
fuel into the carb chamber and therefore give the symptoms you mention. 
Ordinarily, I would have expected that the float valve would check that
problem but if it did not shut off the flow of the fuel it could be
forcing the fuel down the tube at the bottom of the bowl and make the
needle valve in the carb act like a fuel injector, spraying way too much
raw fuel into the manifold.

I wish I gor 29 MPG on my Spit!!!!  :)

Joe

Fred Thomas wrote:
> 
> Joe, I had a very good pressure regulator on my "3" I bought from Moss U/K,
> (not available in the U/S), while driving down to VTR S/E 2 weeks ago it
> went out with no warning, just no gas would pass through, so I by-passed the
> regulator and drove 500 miles without one, rather rough idle, very bad MPG
> and just not the same running car,  when I arrived Larry MiCeli gave me his
> spare and the idle and roughness disappeared, before I left home I installed
> new "Bosch Platinums", the plugs after 500 miles were destroyed from heavy
> black carbon and I mean heavy, like pure gas, I carry a spare set so I
> installed the regulator & plugs and drove home, 29MPG (driving 85 all the
> way), and the plugs were just like brand new when I pulled them after
> arriving back home, so yes without a regulator the pump will over power the
> float bowls, even with a low pressure elec. fuel pump.  "FT"

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