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Stumped on this idle surge
I switched to full speed density as I will be installing a turbo in a few weeks and want to get rid of the maf. I came from a procharger setup where I ran a SD/Maf hybrid. Had no issues with anything and it ran great. When I made the switch to speed density I have noticed my car does not like to idle very well at all on cold starts, and even surges slightly when warm (although not very noticeable) and while coasting in neutral. I am still working on my VE table in the upper rpm and part throttle ranges but when the engine is all warmed up the majority of my cells are +-2%. a few are around +-5%. I've read just so many posts about getting the idle cells for the VE dialed in to correct that issue. When logging when the engine is all warmed up they show no more than around -3% yet on a cold start some cells are lean by as much as 12%? I messed with the base running airflow and idle spark and nothing I have done seems to have changed anything. I also adjusted the max fail % whens tps or maf fault is detected. There has got to be something i'm not doing right or missing. If anyone could take some time to look at my tune and log I have attached with the idle surge and give me some pointers I would appreciate it! The car does not have any crazy mods (Cold air intake and ported intake manifold with id850 injectors on e85 right now). I just don't understand how it ran fine on the procharger setup yet when I completely fail the maf it goes nuts. I should note this is a 2015 camaro ls3 with the enhanced OS and using a aem wideband to tune my VE in open loop.