Re: [tuner23] Re: Air Temp Sensor?

["Jeffrey Engel" <jengeltx@yahoo.com>]

Hey all!

I've been unable to find the code that lead me to
believe high ACT temps pulled ignition timing.  At
this point, I have to conclude that my thinking was
most likely wrong.

Sorry to have confused anyone.

Jeffrey Engel

--- dcolvin_xr4@yahoo.com wrote:
> Looking at Jeff Engel's LA3 disassembly my best
> guess to date is that:
>
> ACT effects boost control and spark timing but not
> fuel control.
>
>                                       PT       WOT
> The spark advance adder functions at 2C56 and 2C72
> use VAT and not 
> ACT.
>                                    PT       WOT
> The spark advance adder tables at 3518 and 35A0 use
> ACT for the 
> x-axis.
>
> Based on the data in the tables at 3518 and 35A0 a
> maximum of 2 
> degrees spark advance is added below 60 degrees F.
>
> Also based on the calibration data at 3518 and 35A0
> spark timing is 
> never retarded based on ACT.


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