It runs about 4 seconds and dies.

What is the fuel pressure? Could be the fuel injector/s driver circuit on the computer-How did you determine it has no pulses?

I used a noid light, then a logic probe to be sure it wasn't losing power. Also no codes,and a fuel pressure gauge was used to check pressure before checking injectors. If you start the car, let it run it's few seconds and shut off it will only spin over if you just engage the starter, but will run a short time again if you cycle the key off first.

Verify the fuel pressure with a gauge and also check/test the IACV and EGR valve-also the TPS and MAF sensors