R32 GTR Constant Rich Bank Warning

[BourneThisWay]

Hello, again,

I’m having this strange issue where in the middle of cruising, I would constantly get a rich bank warning. I’ve tuned the base fuel map to idle at 14.2 AFR and cruise 13.8-14.0 AFR. This usually occurs just after the coolant temp correction and post start enrichment ( air temp correction is 0) are done. My idle duty cycle at 80C is 43% and with an idle target of 1050 and manages stay in range of it. I don’t know where else to look.

I have NZEFI 1000cc injectors with a flow rate of 906, as stated by the company, a Nismo High Flow fuel pump (294kPa), and OEM fuel pressure regulator.