Does anyone know at what temp the zero correction value is at? Im trying to disable the afm temp sensor so i can run a maf, if i know what temp the DME makes no fuel corrections, i can run a resistor to disable the sensor.

Oh and this is for the late 5V AFM/DME.

 

Im assuming it should be around 70 degrees F?

 

AFAIK, anything over ~66f should put you on the 'zero-correction' part of the IAT Fuel correction table.


-Rogue

 

Looking at some tables from FRWilk, i think your probably right. Actually it looks like the early DME is 66F and the late DME is around 59F. And it looks like there is negative correction after like 104F. I guess ill try a 2K resistor and see what happens

 

Have a link to the tables your looking at? Every .bin I've seen zero's the correction after a certain temp. I haven't seen a negative correction either...


-Rogue

 

Well the tables im looking at dont have the bins. Its just a temp vs. resistance table for the sensor. But the way its formatted implies that 69f is zero correction. Oh and negative correction was the wrong choice of words.

Heres the tables copied from Wilks site the944.com. Im to lazy to format the tables.

1984 Air Temperature Sensor
Air Temperature Minimum Resistance Maximum Resistance Tolerance
0°C - 32°F 5.0kohmega1.gif (855 bytes) 6.2kohmega1.gif (855 bytes) 10%
20°C- 68°F 2.2kohmega1.gif (855 bytes) 2.8kohmega1.gif (855 bytes) 10%
30°C- 86°F 1.5kohmega1.gif (855 bytes) 1.9kohmega1.gif (855 bytes) 10%

The early and late AFM sensors appear to be the same part but are specified in different ways.

1986 &1986Turbo Air Temperature Sensor
Air Temperature Minimum Resistance Maximum Resistance
0°C - 32°F 4.4kohmega1.gif (855 bytes) 6.8kohmega1.gif (855 bytes)
15°C - 30°C 59°F - 86°F 1.4kohmega1.gif (855 bytes) 3.6kohmega1.gif (855 bytes)
40°C - 104°F 1.0kohmega1.gif (855 bytes) 1.3kohmega1.gif (855 bytes)