Ok, I've had this set up on the road for 10,000 miles. I've worked with a local tune shop that uses HP Tuner also.
What has happened is I lost (so has the tune shop) any readings from the STFT & LTFT???
It worked for a while.

This is what I have 2006 Cobalt SS 2.0 installed in a 1995 S10.
The ECM runs the engine only.
I have separate sending units for gauges and factory engine sensors.
I had to use a wiring diagram and redo a lot of the harness that was needed for the ECM.
The tune shop seams to think that I lost the adaptive / learn side of the ECM.
I have checked the wiring now 3-4 times and got another ECM. (same results with 2nd ECM)
I still have no CLUE what, where, anything has changed

CAN ANYBODY HELP!!