They have roughly 10K on them, they are Delphi ES20022. Thanks for looking at the logs.


WOT AFR is 12-12.5 right now. Still on the base tune here so it's by no means dialed in.

Still curious why there is such a huge drop in MPG when it's not running rich and with only a slight increase in airflow. Doesn't make sense.

 

So many factors plus not being able to be there are look at things its hard to diag.
I would go to a reputable tuner and let him have a whack at it..
A few things need to be checked out so we know if your readings are accurate.
1) Are your O2 sensors reading correctly. Race fuel play havoc on them and they can become inconsistent.
2) The map sensor.. Which one do you have? 2bar? Is it functioning correctly?

Just some examples of things I would look at.

Boost leaks cause these enrichment problem as well. You wanna make sure you have no boost leaks.
I like to use Aquanet hairspray on my couplers..I know it's weird but it works!

 

My tuner is a very reputable sponsor, but it's through email. Not ideal but it's just to get me on the right path, and then I'll make adjustments from there.

The sensors have seen nothing but 91 octane. The MAP sensor is still the 1bar sensor, and it appears to be reading correctly (not any different than before the turbo). I pressure tested the cold pipes and there aren't any leaks. But it's not making any boost at cruise so they shouldn't be the cause of the problem anyways.

If want me to log other PID's let me know. It's easy for me to log to and from work. But I'm sending my wideband off for repairs today.