rsi engine change, car won't start, seems to be immobiliser

[beltabry]

I have just changed an engine in a clio rsi and when I try to start the car, it trys to start but seems like the immobiliser keeps cutting it out. I have tried locking and unlocking the car a few times but it still wont start, any ideas what it could be?

[stan]

Is the fuel pump priming?

[beltabry]

yes, everything seems to be working fine and then it cuts dead just like it does when the immobiliser is on.

[clio_rsi_turbo]

have you kept the same ecu in the car as before? if not it wont start.

[beltabry]

no the ecu has been changed, do you know what needs to be done to start it?

[bass_direct]

you need a phase 1 rsi ecu..

[clio_rsi_turbo]

^^^^^^^^^^^^^^^^^
you need a phase 1 ecu because they dont have the built immobilser.