power dip at 3.5k rpm??

[Hobbes]

You have isolated it to a mechanical problem by changing the ECU rom but more so seeing it with stock configuration.

This may be the problem

Check the fuel correction factor. (normally thrown off by poor CAI, leak in the intake system or problem O2 .)

Reasoning:

When the ECU is forced to make fuel correction (up to 25%) it throws off its ability to make adjustments when you go through the c/o loop transition. Because the AF correction is so far off the ECU cannot keep up with that transition.

Hobbes

[west_minist]

For each log, I am see a o2 problem.

Time will tell.

[west_minist]

Just a little tired tonight and nothing to tune for tonight - which is good

I love this WRX and I cannot wait to see one day it is working.

Here is the car in test mode w/ oem wg=0

The owner had this rom, so if something is not log, you can request the owner to logged it, if he can.

Peer through the logs and see what the issue could be