I just rebuilt a 90 laser turbo, and it won't start. Everything
looks fine except injectors #2-4 are only getting 1.5v and #1
(closest to tbelt) is getting almost 6v from the injector harness.

If I fire each injector by hand with a 6v battery, then jump in and
crank it, all four cylinders fire once and then it just dies.

Other stuff checked:
-starter runs strong
-compression is 80psi across
-have spark on all, gap .029
-good fuel pressure in rail
-injector harness and plug wires all making good contact
-plug wires are connected to coil pack in correct? sequence-(4123 from left to right)
-plug wires are within 2k ohm of spec
-ecu looks brand new, no cap leakage, plugged in.
-known good battery, charged overnight too
-MPI and all fuses intact and test good

What do I need to replace? It ran before the rebuild, and I was
really gentle on the electronics. Thanks guys