biggentplayer

I have been having this issue with my 1990 240sx for the past six months and I cannot figure out this issue. I have owned the car with the swap for three years and have never had any other issues with it running, until now. I would greatly appreciate any input that may help me solve this issue, please help!

Issue: S13 SR20det engine cranks but does not start.

Symptoms:
1) Engine has spark to all four cylinders.
2) Injectors are firing. (spark plugs smell like fuel)
3) Fuel pump is working. (48-50psi at the fuel rail)
3) Engine will start with starting fluid and dies.
4) If started with starting fluid and the throttle held open, it runs but breaks up and back fires out the exhaust.
5) If I unplug the CAS and plug it into my old CAS (not installed in engine) and rotate the shaft I can hear the injectors clicking.

Solutions I have tried:
1) Plugged my ECU into a friend's car with same swap and his car ran perfectly.
2) Replaced the Cam Angle Sensor and set timing according to the FR Sport guide.
3) Replaced main engine harness with new harness from Wiring Specialties.
4) Checked ignitor chip per FSM specifications. (I have spark so this can't be the issue anyways)
5) Checked Start signal wire(orange) from the ignition to ECU and it is working fine.(10-12 volts)

I am not sure what else there is to do to try and fix this! Any help is greatly appreciated! Thank you

ISSUE RESOLVED: The injectors were not receiving the full constant 12 volts they require. The injectors receive constant 12 volts from the chassis plug (gray) located behind the passenger side headlight in the fender. This is where the main engine harness connects into the chassis harness. A solid red wire on the main engine harness plug is what sends the injectors a constant 12 volt signal.

Big thanks to Yury at Wiring Specialties for the information that helped solve this issue!