Switched ECU’a now RB25DETNEO won’t start

[BroknRBJoshy]

Yo guys I need advice 

I just got the correct ecu for my car (25DETNEO) and now it won’t roll over, I tested my old ECU (25DENEO) and it’s doing the same thing would you have any idea what it could be? I think I may have bumped the wiring when I was switching over ECUs not to sure

 

i was running the DE ecu for a little bit as I didn’t Realize it was DE and that was the reason I was running really rich and now I’ve got the correct ECU and it just makes the cranking sound and fuel pump primes fine but not rolling over 

[joshuaho96]

Have you pulled codes yet? Someone local to me had a no-start situation and they were confident it was a CAS issue until I checked the codes and found code 21/ignition primary open circuit.

[GTSBoy]

Let us assume that "roll over" means "actually fire and idle", and not "just rotate on the starter".

In which case, if you think you bumped something, then yes, examine the relays next to the ECU, because one of them is for the ignition (coils) and will happily let you crank but not fire if it is not working.