s14 sr20det cranks but wont start

[projectblak]

Alright guys i really need your help. got a s14 sr with fresh rebuild dropped it in with wiring specialties plug and play harness upper and lower. k primed the motor and then come to start it and it started for a split second and then died. after that all it does is crank over but wont start.
sooo
1) fuel pump primes just fine (walbro 255 new z32 filter) checked lines and have pressure in and out. fuel circulates all around.
2) there is spark
3) timing is dead on perfectly timed and CAS is set right as well.
4) all grounds are connected
5) when we pulled the spark plugs they were NOT drenshed with fuel they were rather dry just a hint of fuel on them..
what could it be ??
Bad ecu ?
bad Injectors ? bad grounds?
why would it start for a sec and then die.
BTW the motor came with denso red cap injectors ( 550's maybe?)
please i need your help i need to get the car inspected by the end of the month.
thanks in advance