ok so heres the problem, i have an 04 civic si ( yes the one that looks like a minivan lol) and every now and again it dies whenever i'm at a stop and the car is idling.

It's not a vacuum line, and the car is stock besides from a header and intake but the it does have 520cc RC injectors because it used to be boosted. Is there anything i can use to tune with these injectors? Im currently looking at the Hondata K-series Ecu reflash and apexi afc neo. Does anyone know what i could use to do my fuel maps with?