HELP! 300zx fuel pump wont turn on - relay is good

[psycle]

Hi, I could really use some help. I have a 90 z32 which wont start. I have killed my battery 2 times trying to test multiple things and I am out of ideas. Here is what I know: My fuel pump relay is new. My ECU is new and the cable is plugged in tight (verified working). If I jump the relay, i can get the fuel pump to start pumping fuel, but the engine still only cranks but does not turn over. (I know its pumping fuel cause I took the fuel filter off and watched it pump fuel). I checked all the voltages and they are all within spec. The fuel pump had gone bad, and I replaced it (so its new). I am new to repairing these cars, but here is what I know I have:- 90' Nissan 300zx TT with a 94 JDM motor (just swapped)- Upgaded body kit and springs and shocks(not that it matters)- New battery- New Plenum (kept the EGR cause I live in CA and didnt want to chance it)- Front Mount Intercooler- Turbo timer- upgraded gages, including boost gauge and engine rich/lean gugeThats pretty much it, no new turbos, exhaust, or any of the main stuff yet. Just some basic body mods and a new motor. When I tun the key to on, I hear the HICAS start up, and the oil pump. I get a check engine light and just a constant "trying to turn over" but nothing.

I feel I have ruled out the Fuel Computer cause the pump pumps when I bypass the relay. (with varied voltage) I also checked the voltage going into and coming out of the fuel computer and it looks accurate. It seems like there is something I am missing either a security or electrical issue. (It appears that the relay is not getting the signal to turn the pump on and whatever is doing that is likley also preventing the motor from starting when I bypass the relay) Also, I have tried to start the car with the security light on the dash off, by pushing the hood sensor down just to make sure that wasn't it. I am out of ideas. The only thing I can think to do is go buy a code reader and try that but they are a bit expensive for me now.

If anyone has any suggestions, I am definitely open for anything at this point.

Thanks-