So i had a 2005 Manual G35 Sedan was in an accident and bought a rolling chasis, its a 2004 auto sedan. Long story short swapped motor and trans and got it running, my car had multiple lights on but it didnt bother me car ran and drove fine, it overheated one day and then started missfiring. Its come down to believing the ecu is sending the wrong voltage because it keep frying the cylinder 6 coil. I need an unlocked ecu because of the trans swap and motor swap. I have the old ecu from the 2004 car but cannot find somewhere that will do this. Can anyone help?

 

Get a matching ECU for the drivetrain (6MT revup) then we can flash it with Uprev to bypass NATS and you just plug it in and go. If you REALLY want to use the 04 ECU I can make it work but its not ideal. Biggest issue is the 2005 6MT has the revup engine, 2004 auto has a non revup. Then the 5AT to 6MT conversion. Bypassing NATS is the easy part. Not so easy and just unlocking it and plugging it in