Hondata

for context the car is an 03 civic. Engine is a turbo d17a2 with forged bottom end 8.8:1 compression, and a crower stage 2 turbo cam. Its running on a PND ECU with Kpro v4. The car is new to me and I have some concerns about the tune.

At WOT in third gear it hits max boost which is 20psi. The AFR was around 12.6-12.8 and was jumping around a bit sometimes even jumping over 13. To my knowledge this is getting into the dangerously lean territory. Fuel status shows it's running in open loop during WOT, however in closed loop advanced, the "WOT compensation fixed at lambda 0.85 (12.5:1)" box is checked off. Will this be overriding the main fuel table even though it's running in open loop? In the log it shows that both long and short term fuel trims are 0 during the pull, would adjustments made by the WOT compensation show up under these trim values? The main problem is that in the calibration, the no WOT compensation option is greyed out so I can't even turn this setting off if I wanted to.

Attached is my data log for a 2nd-3rd gear pull as well as the calibration I pulled from the ecu. Any advice regarding the above questions or just generally how the log looks in terms of safety or optimal tuning would be greatly appreciated.

I would recommend discussing this with a tuner that can assess it and make any necessary adjustments.

UPDATE

Sorry for the stupid post, I figured out I was misunderstanding how the "WOT compensation fixed at lambda 0.85 (12.5:1)" feature works. I thought it would operate similar to how closed loop would be adjusting fuel trims to achieve a target lambda. I was worried it would override all my changes to the fuel table and keep me stuck at 12.5:1 at WOT.

Instead I believe that it is fixed multiplication of the fuel table. It assumes that your fuel table is tuned to 1 lambda (14.7) so it increases the WOT fueling by 17.5 percent to achieve a 0.85 lambda (12.5:1). If you original fuel table is richer than 14.7, then the compensation will make your resulting AFR richer than 12.5. Since it is just a fixed adjustment, I was able to reach my target AFR of 11.8 just by datalogging and adjusting the main fuel table like normal.

I did find other threads on the forum that explained this already, I just didn't fully understand due to how they were worded.

The only other mystery to me is why the option to disable WOT compensation is greyed out. Is it just a D17 thing? it seems like all D17 calibrations have the same phenomenon, whereas any k series calibrations allow it to be turned off.