14cux model numbers

[en]

Can anyone help me find a list of the various model numbers for these ECU's ?
I found this site but it doesn't list the ECU numbers i have.

http://www.gomog.com/allmorgan/LRHotwireECUs.html

I have tried swaping different tune resistors but can detect no difference in performance of my 3.5L engine.
Do all ECU's recognize different tune resistors? Or are the differences in performance not noticeable?
My ECU is an AMR3726R
I have tried running without a tune resistor and don't get the error code that "tune resistor is out of range"


Thank you