I have put a 92 1uz from sc400 into my 1996 sc400 using 96 harness and ecu. I transferred over parts to make it work, manifold, cross member fuel rail throttle body etc etc. car cranks very healthy good compression has fuel but zero communication to ecu with scan tool. Will not start only crank. Ecu shows it’s present by CEL illuminated on dash but will not start. Giving ground to ignitors to activate coils still won’t fire. Signal issue of some sort im not sure. Everything plumbed all fuses good all connectors good wires are fine everything is good plug and play at this point. I’m lost at this point, everything worked perfectly but I throw in this engine and it won’t fire. Engine is healthy guessing signal issue with ecu. Let me know if I need anything else or what I should do any input is good. I’m hearing I might need to buy a 92 Ignitor module as well.
