<VV> Fuel Mileage in winter - only minor Corvair

[Shaun]

Hi Craig, what I meant was not "richen up the mixture" but "add more fuel to
maintain stoichiometric", thus reducing milage...
SM
p.s. sorry Mr Burkhard<G>

----- Original Message ----- 
From: <NicolCS at aol.com>
To: <virtualvairs at corvair.org>; <shaun_mcgarvey at shaw.ca>
Sent: Wednesday, November 30, 2005 11:13 PM
Subject: <VV> Fuel Mileage in winter - only minor Corvair


> Well I'm not Mr Burkhard but...  The purpose of a mass airflow sensor is
to
> determine the exact amount of air that is ingested, automatically
compensating
> for temperature, altitiude, and other factors that affect density.  The
ECM
> calcs the matching quantity of fuel needed to create a stoichiometric
(neither
> rich nor lean) mixture.  The O2 sensor plays cop and tweaks as needed.  If
the
> engine likes the cool, dense air (yum, yum) and tries to spin a little
faster,
> the nasty little IAC (idle air control) closes down to maintain the target
> idle speed.  Motor's happier but has nothing to show for it.
>
> <snip> I'm guessing that colder, denser air would cause the mixture to
richen
> up in an injected engine...
> Mr. Burkhart?
> SM <unsnip>
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