Using the stock chip. Although other chips yield similar results. I guess 900 is a little high but I always thought most GN's idle in park at around 800 - 900. Mine at idle in park with the TPS connected is missing at idle and rpms are around 600 -650. Dump it in gear and they fall to 575 - 625. I know this is low. IAC is around 15-20 in park. TPS is at .42.
I just found it strange that the miss completely goes away when the TPS is disconnected. I was almost convinced before this that there was a mechanical problem (worn cam, head gasket), but know it would appear that it is electrical (computer, etc). I've already updated the grounds. Swapped every bolt on electrical component from the TTA onto the GN except crank sensor with no improvement. Any ideas?