recently i installed a jlt rai intake , bassani cated x pipe and slp lm 2 0n my car ,it ran fine for a while than it started acting funny it run good than putter like it was farting than run good it would idle low and die out ,so i changed the maf and it runs good except it seems to idle a little low ,once in a while the rpms dip and it dies .anyone know what this could be?