Wont run?

[skdline63]

hey guys hope u can help me out, iv had my motor rebuilt (forged pistons, HKS hadgasket etc) iv put a new intake manifld on jun style one, top mounted my GT2876R with tail wastegate. Ka throttle body i changed the TPS. finally got everything done and went to start it and it wont run for long, it will run for about a minute then it will just die, or if u try to giv it any accelarator it will die, the ecu has been tuned for that motor (510cc injectors) and that turbo so i figured the ecu should not be a problem even though it always was hard to start but it would always be fine after about 1 minute of going. iv checked the ecu for codes it coms up fine just 55, also checked for vac leaks and it seems to be fine. iv cleaned the AFM. i tidied up all my wiring by geting rid of any plugs that wernt needed because i hav the jun intake manifold. i had the changed the positions of the battery earth and the two lil earths the bolt to the intake manifold. any help would be awsome thanks.