Low idle yrv turbo/k3vet

Still having a low idle issue, idles down to about 500 rpm in D

Cant find a vacumn leak anywhere

Removing coil leads doesn’t show a weak cylinder

Swapped out map o2’s and coolant temp sensor

Cleaned tb and replaced iacv

Seemingly drives completely fine with no noticeable miss, does have a hiccup now and then at idle

Igniter maybe?