I have a 1g dsm 5spd why does it seem like its fuel cutting?

My mods are mhi 16g from forced performance,walbro 190 rewired, hallman boost controller, autometer boost gauge.....I am running 10-12 psi and at 4500 rpm it fuel cuts and it seems like it shouldn't be for the amount of boost I am pushing...I have ran out of ideas I didn't think I would need to get bigger... show more My mods are mhi 16g from forced performance,walbro 190 rewired, hallman boost controller, autometer boost gauge.....I am running 10-12 psi and at 4500 rpm it fuel cuts and it seems like it shouldn't be for the amount of boost I am pushing...I have ran out of ideas I didn't think I would need to get bigger injectors and afc yet but maybe I do....please help!! Thanks,tyler
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