LSX454 w GMPP E67 ECM - Idle Surge

[camaro10]

The throttle closed values makes sense. Limiting the blade by using max area might also help with the over/upper corrections as the blade will not go past that hard limit.

I️ agree, the airflow is overpowering the fluctuations. The thing is that spark and airflow are both working together to increase RPM, and then cutting it back as well. I

Try that tune out and see after you reclock that maf. A factory ls3 uses alot more spark correction for large errors. I think around 26 degrees. I would try it than start sneaking in more timing if it helps.