2 Attachment(s)
Back to the drawing board
Unfortunately I had a setback. Ironically while cleaning up wiring and installing a marine fuse panel to make sure everything is protected the hot wire from the battery touched a bolt. That bolt, like all others, was connected to a big metal tub (my boat) and my ECM got fried to the point it couldn't even be connected to. The ECM I replaced it with I could connect to it and it would operate usual relays with key on. I traced all wires and they appear to be fine (thankful for having a much more simple and easy to access harness).
There was only one other E67 in town that I could find. It was off a 2006 Colbalt SS 2.4l. I assumed it would be close enough to just copy over the tune changes. Unfortunately I found several tables that made me scratch my head at how different they were.
KPA columns in particular in the '06 went from negatives to positives where the '07 G6 started positive and went higher.
I'm not sure how to marry the 2 up or how the ECM is looking at the same sensors and tables so differently. It's crazy that the same engine and ECM only one year apart in similar applications would have different management approaches.
If anyone has suggestions on how to get some of the boat tune onto the new '06 cobalt ECM please let me know.
I did install a MAF so hopefully will get back to finishing the tune soon.
The tables most notable to me:
fuel tab; flow vs kpa, offset vs volts vs vac, and offset vs volts vs map were completely different
airflow - accelerator pedal position map
I also noticed that the place you normally disable VATS wasn't there but I did find the tab with VATS patch applied 'yes or no'. There is much confusion as I've read many conflicting forum posts as to whether I even have VATS on this ECM.
Attachment 72000
Attachment 72001