Auto learn code

[Squash]

What is this "autolearn" code?  Is it different than
normal GM code?

Squash

--- Scot Sealander <Sealand at clarityconnect.com> wrote:
> Well, spent the weekend out driving around with the
> auto learn
> code installed in the ECM.  It works!  After a lot
> of driving around in 
> various load/speed settings, the VE table is coming
> together.
> 
> An observation.  I think the manifold is a terrible
> place to put
> the MAT sensor....  (The learn code also stores the
> MAT sensor
> readings, to compare the VE numbers recorded at
> different MAT temps.)
> At low airflow (like idle) the MAT temp is quite
> high.  The more
> the airflow, the lower the MAT gets.  But I think
> the MAT air temps
> are a lot higher than actual air temps.  As today,
> at 20 to 30 
> degrees F colder than Saturday, the VE numbers are
> different, esp at 
> idle.
> 
> I am using a air temp density table that is close to
> the theoretical 
> air density change with temp.  This may not work
> with a MAT sensor,
> as it seems to get artificially warmed....  The next
> logical step
> seems to put the air temp sensor at the output of
> the intercooler,
> and use a airflow based adder to get actual cylinder
> air temp.
> 
> Scot Sealander
> 


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