I have a service manual, and stuff I got online. It's not so much of an electrical problem now. That seems to be working. I'm running into vacuum issues I think. The motor starts with spray into the TB, runs for a few seconds, revs when I pull the throttle cable, then dies.
Do you have an ODB2 scanner (not just a code reader)? It would help to know what the values are for:
MAF flow
Long term fuel trim (LTFT) bank 1 and 2.
PCM operating mode (open loop or closed loop)?
Are the O2 sensors switching or stuck lean/rich?
What I'm interested in see is IF the MAF numbers change as the throttle is advanced. If the PCM isn't getting a good MAF reading it won't add more fuel as the throttle is opened. Thus making the motor lean out.
Note. A intake vacuum leak can make the MAF read low from the un-metered air. This will also show up in the LTFT's as positive number (adding fuel) at idle. Normally a vacuum leak will also show a decrease in LTFT's as the throttle is advanced. This is because the ratio of un-metered to metered air decreases as the throttle is opened.
It seems to me that as part of a new build the basic MAF functionality should be confirmed as a wiring problem could be involved.
On "trick" is to disconnect the MAF which will force the PCM into "open loop". If the motor starts and runs, this strongly points to a MAF related issue.
Is the fuel pressure regulator intake vacuum reference line connected and leak free? Have you confirmed that the fuel pressure is being referenced to the intake vacuum?
If you do not have an ODB2 scanner, here's some information on an affordable ($30) Windows based unit that is able to access operational PID's as well as graph multiple PID"s. Might make short work of your problem.