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 .