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Re: [tuner23] Re: Air Temp Sensor?
----- Original Message -----
From: <dcolvin_xr4@yahoo.com>
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.
The spark advance adder functions at 2C56 and 2C72 use VAT and not
ACT.
If so, what is the point of having two tables, is one PT and the other FT?
The spark advance adder tables at 3518 and 35A0 use ACT for the
x-axis.
Again, is one PT and the other FT?
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.
I'm curious as to why some people were reporting better performance with the
ACT unplugged. Faulty sensors (cheap, non-Ford sensor) maybe?
John Baas
http://a4tqms.tripod.com
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