I've been experiencing an issue with my car where the AFR is very unsteady once I get over 4.2v MAF reading. I do not believe this is tune based as we have tried everything we can in the tune to resolve this but it continues to do the same thing.

I have also done a smoke test to verify that there are no leaks.

Any ideas what this could be? potentially fuel delivery related? FPR issue maybe?

mods:
- COBB SF intake
- COBB Catted Downpipe
- ID 1000 Injectors
- COBB FPR
- AEM 340lph pump
- Turbosmart 40mm EWG
- PLM uppipe
- Grimspeed 3 port EBCS
- IAG v3 Competition AOS

image of the AFRs:
https://imgur.com/a/GRczMBp