So I'm getting ready to put in some dsm 450s and injector box with my neptune ecu and wanted to play with the data logging and what not while my car is running perfectly fine which is how I started finding weird things on my new car. I'm running, what I think to be a stock gsr map, and 12 to 1 rising rate fuel regulator on a vafc. I wanted to just put the same map on my new p28 and do some pulls and get familiar with neptune but I've come to realize is I'm running a jdm p72. I pulled it apart and the board has not been modified at all so I put a jdm gsr basemap on my p28 and its running lean at idle and revs like ****. Does anyone have any ideas what kind of map I might be using? The jdm ecu threw all the obd2 codes it should on a scanner which made me think I was just running the stock ecu the car came with the whole time. I'm not running a gsr intake manifold either and kinda figured id throw a code for the intake runner not being plugged in if someone has some info on that too thanks

 

And i forgot to add it's a 01 gsr with a t3t04e setup

 

Maybe you can try creating a whole new basemap, select the 450cc/min injectors, adjust your fuel pressure and check the internet for injector dead times.