I don't think it matters enough. The modern FI is a closed loop system
using the oxygen sensor to measure the exhaust gases. As long as the various
sensors are close enough to get the system to capture and go closed loop it
will work fine. The problem you have is when a sensor goes bad and the O2
circuit does not have enough authority to compensate. Then you run
chronically rich or lean and the "check engine" light comes on. Checking the
fuel
temp would be fairly easy and if you were running an open loop system you
might want to. The later British SU carbs did actually measure fuel temp and
compensate.
keith williams
In a message dated 9/22/2009 2:52:15 P.M. Pacific Daylight Time,
gboone70@yahoo.com writes:
I'm not aware that any EFI systems compensate for fuel temperature. Most
do
however, have an IAT sensor (intake air temperature). They also compensate
for atmospheric pressure with a MAP sensor (manifold absolute pressure) or
a
MAF sensor (mass air flow).
Gary
From: "nmleeds@mindspring.com"
<nmleeds@mindspring.com>
To: Datsun Mailing List
<datsun-roadsters@autox.team.net>
Sent: Tuesday, September 22, 2009 3:04:30 PM
Subject: [Roadsters] OT: EFI, Temp / Atmospheric Pressure Controls
All,
I
was just pondering (rather than putting the head back on my Datsun) and
wondering, how do EFI systems compensate for fuel tempurature and
atmospheric
pressure. Both should change the volume of the fuel relative to air mass
and
change the mixture. Is there an adjustment, or does it not matter that
much?
Nathaniel
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