What cause very rich cold start but 0% correction hot

[Alex5.0]

Hi ,

I have a car 2006 GT Procharged , 60lb injector , hpx maf , gt500 fuel pump .

At Cold Start 50-70F STFT cut 30% in close loop and it almost die when try to roll the car . But Hot ? Fuel trim 0-2% run perfect .

No Check engine , new plug .

Any idea what could cause this trouble , never happen to me before .

[K44]

Post your tune.

Off the top of my head would be cold fueling table or stoich set wrong.