Follow-up: Load limit unknown was indeed screwing my attempts to tune in the 2,000-5,000 rpm range. i changed my load limit unknown values to around 0.65 - 0.75 as rpms increase between 2,000 and 5,490, and now it is easy to enter open loop and rely upon the air fuel ratio tables for tuning. If you ...

Do your tunes fix the lean OE fueling from 2,000-5,000 rpms? I've tried everything on my tunes to fix the car running so lean in that RPM range but nothing seems to work. it seems like the car is still trying to run in closed loop below 5,000 rpms.

i'm going to try enrichening the acceleration enrichment tables - i know VT says that the ECU uses the lowest value between enrichment and air fuel tables, but i suspect these tables might've been causing the car to run quite lean up until ~5,000 rpms as other rx8 owners have noted.

There is another table that is maximum load limits for closed loop... those were set quite high in the lower RPM ranges, seems like a promising option to explore. will report back!

Do you all think load limit unknown might be playing some time-dependent role in fueling below 6,000 rpms?
...
...

Apologies for the delayed response. sure, i attached four logs that show inconsistent / weird fueling from 2,000 to various RPMs

FIX: my car was running off the table, i.e. the fuel table went to 9,000 rpms but i was revving to 9,300. i had to rescale the fuel table axes to allow myself to enter a a value for the highest rev range. that allowed me to lean out the 9.000-9,300 range.

Also, all three of the charts below are with the same tune, yet the AFRs between 2,000-5,500 seem to be very inconsistent in terms of enrichment. it honestly looks like sometimes the ECU is trying to target 0.95 lambda, and other times it suddenly drops to the values more consistent with my AFR tabl...

My AFRs from 3,000-9,3000 rpms are looking decent, but i keep trying to enrichen the AFR tables in the 2,000-3,000 but it seems to have no effect. any hints on richening up the 2,000-3,000 rpm range? I'd like to see 13.3 AFR / 0.90 lambda.

vtune file and images attached

I have run into a challenge where the car is running a tad too rich at 9000 rpms (see attached data log) but i am approaching the adjustments limits of the fueling table. My excel calculations are telling me i need to enter a fueling correction of greater than 1.0. Question is, can i lean out the ca...