Drsous

Hey evom members, I just finished my build and I'm trying to get all the little bugs outs. Car idle fines on cold start and warm start. The issue happens when I let off the gas. My rpm starts to bounce around and sometimes get stucks at 2k rpm. Did a boost leak test and everything was fine. Checked most vaccuum lines and everything also came fine. Replaced my maf sensor, map sensor and my iacv, same issue. My throttle body was also rebuilt. I was thinking maybe it could be the biss screw but I'm not 100% sure. I thought if it was my biss then the idle at a stand still will hunt. Any input or suggestions on how to fix this will be greatly appreciated

Bhsj13

Tps?