I drove her to work this morning. No problems.

I go to start it up after work, and notice the wideband is starting from 15.2 and slowly as it warms up dropping to 10.0. (Not cycling, just dropping)

I check ECM O2 not cycling after 20-30 seconds. I drove it home, but after X RPM or more than 25% throttle, Wideband just reads 10.0 and the bogs.. (boost will still build and the car will accelerate (just slow as molasses). O2 is not cycling normally.

So I grannied it home (car would not do over 110 without bogging)

I checked for boost leaks, just the little throttle body one. Exhaust leaks, tiny one at the O2 to DP. Everything is is connected.

Not sure where to look at this point. What's confusing to me right now, is I have 3 O2 sensors and they are all hooked up.

A) 1 in O2 Housing.
B) 1 Just after flex pipe
C) 4 feet downstream from B.

The car is using the simulated narrow band.
Why are the others there?

I attached the first log (no WOT attempts).
And second was just now, I just tried it to log it.

Any ideas?

From Work 2 Home (No WOT)

After Leak Tests (Short WOT)

Here is the O2 housing again. This looks like a narrowband. I thought the wideband was in the O2 housing.

Fixed. ECU lost its tune somehow. I re-saved last nights configs to ECU. She's back to normal. Hmmmmm....

I've seen once or twice where V3 lost the tune for some unknown reason.

Any reason why you have your displacement set at 2.7L in your SD config?

Must be user error /blush.

I was in that table after I shut down getting to work. I was doing SD VE Adjust Combined FT to update some cruise data. I must have hit the up arrow while that was selected and didn't notice.

I will be more diligent in checking log