Tuning 2001 Monte Carlo, 3800. Intercooled turbo kit, came with LT1 MAF,43lbs injectors. tuned first VE, then connected MAF, then tuned MAF by % error, car runs great until after a few restarts after sitting or coming to a stop after a few drives a p0300 code shows and rough idle starts and scanner shows misfires in 5 of the cyls. If I disconnect the MAF no misfires, tried another LT1 MAF misfires come back. This only happens at idle. Do I need to work in MAF delta airflow area?...or somewhere else?