So I have about 8 miles and 2 hours of run time on my fresh rebuilt engine, the idle is surging bad from 1200-1700 RPMS. I've checked everything!! 172 psi across the board and good oil pressure, head was rebuilt and all gaskets are new and torqued to spec with no leaks. the only thing keeping me from driving her is the idle problem.
-ISC is good
- throttle body shaft seals just replaced
-TB has new gaskets on both sides
- on SD V3 lite with the base SD map
- no wide band, just need to weld on the bung
- no boost leaks at all! I checked up to 15psi until my tester shot off like a bullet
- FPR set at 42.5 psi with Evo 8 550cc
- BISS is grounded out and doesnt change anything
- TPS set at .63V
-All settings in link are cherry and i have tried adding dead time
- I even hooked back up my 2G MAF and adjusted the airflow sliders and its the SAME outcome as SD

On SD at idle revs are rising and dropping bad, regardless of this surging AIRflowper rev is between .24-.26 and Fuel trims are -3% to +4% during surgeing, if i start decreasing airflow numbers it runs lean and the O2 goes from 0.00-0.02 and doesnt cycle at all. I f i raise airflow fuel trims go to +17% and revs raise, O2 cycles good but the surgeing gets faster and worse and airflowperrev goes to .30-.38.

This throttle body is off my talon, I swapped them because it would never idle no matter what we did. The only thing i havent checked is the FIAV, does anyone have any experience with high idle surgeing while warm before closing the FIAV... Could this work? I'm F'in stumped and feel like burning it haha