Timing(maybe fuel) plumits when a4 shifts

[acomp917]

Hello All,

Just to the point of being able to log/bbl an upgraded 2k to 2002 silverado pcm. I'm starting to become familiar with the tables... all 2 million of them.

I noticed exactly the same thing on the 2k tune. The O2's don't rise during shift(reduced timing, would cause this if the fuel did not cut), they seem to lower momentarily. If I had to guess... it looks like torque limit.

Anybody seem anything like this? Do you know the cause?

This thing is COMPLICATED! I'm really starting to appreciate the software and the efforts of the developers logic/programming. Takes a lot of getting used to, although it allows the user to analyze the PCM in endless ways.

Thanks for any help,
S