i have to report back and say that this PE trick was sketchy in my case. i dialed in correct target AFRs by using both the rpm and coolant table. the first few runs were great, right from cold start on a freezing cold day to hot idle, with no drivability problems and some good clean datalogs, and i got the target AFR i wanted. of course i also patched in the blm locker.

it started misbehaving, though. on a cold morning, it would start perfectly, then immediately surge a few times and die.

i waited a while, tried to start it again, and it was good to go.

then it happened again.

i've gone back to CL idle and nothing has happened since, so i don't think it's a mechanical issue.

weird stuff, but i'd hold off if anyone wants to try it until i investigate more.

i will look into 'why' when i get another spare PCM, i think im running on borrowed time on this one, since i'm thousands of flashes in.... i dont want my daily driver to fail a flash without a backup.