So i through this code yesterday. the problem is that when i would get on it i would get alot of sputtering then it would pull and then the check engine light came on.
I have an accessport so i checked the code and got p0103: mass air sensor high circut input. So i cleared it and now when i get on it i feel like i am hitting a fuel cut at 4 grand. I have no clue whats going on so if someone could help me that would be great

my mods 03 wrx
greddy 18g turbo, sti pinks, cobb accessport with tune, turboxs intake, fmic and exhaust, turbosmart eboost and blowoff valve

 

Try cleaning your maf and resetting the ecu.