battlebubbles

Could really use some help. Ive got a 2013 camaro ss ls3 stock engine swapped in. Car really struggles to start. Mass air code p0101 keeps popping. I used an equivalent size intake OD as stock, but its slightly notched to clear radiator hose Hooked up scanner, and at idle, i have 6.9 gps. Im told I should have about 10 grams of air at idle. I have 20 inches of vacuum at idle. Can i troubleshoot this with a Snap On Modus? Those of you with stock ls3's, how much grams per second do you have at idle?