2.0 Ecotec LSJ Unstable idle.

This is my first time posting so i apologize if i leave anything out or do something wrong.

I have a built 2.0 LSJ Ecotec that's running the factory P12 GM ecm and for the life of me cannot get it to idle at the desired RPM. The car has Diamond pistons with 10:1 compression, forged rods, Stage 2 turbo cams ( 212/212 duration at .050" with .419 lift. The centerlines are 109 intake/115 exhaust. Duration @ .006" is 256/256.). Stock head porting. Siemens80# injectors. Turbo swapped to a 60 mil turbo. EWG, atmospheric blow off, Factory pcv routing and a BRFPS set to a base of 43.5 PSI

I have set the idle to a desired of 950. I have played around with other RPMS and it consistently stays about 50-150 RPM higher then desired which is causing it to pull all of its timing at idle. i have base timing set at 10 degrees in the base spark table and it will consistently try and idle around -5 to -10 degrees to try and bring the idle down. It will sit and hunt at idle as well. Itll slowly start coming down to desired and then something happens and the rpm shoots back up to 12-1300. I have tried running speed density and using the maf. I have my fuel trims sitting around +- 5% at idle whether its MAF or VE.

Today I zeroed out the over/under speed timing tables, unplugged the maf and disabled the O2 sensor so it was running purely on the VE table and my ignition table. Idle stabilized, but again it would just sit and idle anywhere from 50-150 rpm higher the desired. Any tips or tricks will be greatly appreciated. Ive been dealing with this problem for over a year and have been tuning this car for about 3 years now and only recently bought this course to further my knowledge and try to fix this problem. Instead im even more confused now. Thanks in advanced