Tuning a 2010 camaro with a 525 HP GM Performance crate engine transplanted into it. I don't know the complete engine specs, but it seems to be mostly the same engine as stock but with a much bigger cam.
During the first 5 minutes after a cold start the car runs poorly at part throttle. It hesitates on throttle tip-in and bucks lightly during steady cruise anywhere below 3000 rpm. It feels like a lean misfire and/or it needs more timing. Full throttle it pulls like an animal.
Car runs great at full throttle and runs good at part throttle when warmed up.
Car has long tube headers and an aftermarket air intake tube.
I'm looking for suggestions for things to look at in the tune to fix the cold hesitation.
Tune file attached.