<VV> Fuel Mileage in winter - only minor Corvair

[NicolCS at aol.com]

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>