SR20 stalling/no start issue

[se7en_]

So, I had a perfectly running SR20 swapped into an s12 200sx 1984.

I decided to upgrade lol.

550 injectors(not leaking, I checked)
FPR(set at 43.5psi and 38ish at idle with vacuum plugged in)
Known working tuned ECU(daughter board, tuned for 550,z32maf)
Greddy t517z 10cm turbo
Freddy intake
Z32 maf

Now it wont start. I can get it to start if I put resistance to the Coolant temp sensor to trick the ecu to thinking its super cold and adding fuel. (minor in electrical engineering)

Maf voltage when I can get it running is 1.0ish volts at idle.

grounds are good on the back of the intake
alternator is grounded
the coil packs are grounded too.
maf is chassis ground on one z32 ground point, and the other is grounded to ecu.
12v to the proper wire as tested by the blowing through the maf and the volts climb on the signal wire with key on engine off.

I can get it to sputter a little when cranking sometimes.
Oh, and the tps signal is 0.46V.
two sets of plugs and two known working z32 mafs tried.

Anyone else have any other ideas for me to check?

[se7en_]

Oh, and I just checked, I do have the fuel pressure regulator hooked up properly.


Anyone have any ideas for me?

[ultimateirving]

Vac leak is most common I would say do a boost leak test. Also how did you set the fpr if you can't start the engine. Or was it installed prior to the other upgrades?