EGT Sensors and Using ECM Inputs

[Michael Adams]

This is a great idea, and perfect for the project I am working on.  I am a
newbie, so please excuse me if these are simplistic questions.

1.  How many unused analog ports are typically available on the ECMs?  I am
interested in doing this on GM ODBII ECMs.

2.  Are there charts available for figuring out the correlation between the
port input to the ODBII data output?

Thanks for any help you can provide.

Michael Adams

>
> Or, insert a signal conditioning thermocouple module (with a
> scalable 0-5v
> output), and feed the resultant output into an unused/unwanted analog
> channel in the ECM, and view EGT in relation to other ECM
> data over the
> ALDL.
>
> Walt.