hello i have a honda accord 2003 2.4l dohc, manual transmission.

my old genuine engine was ivtec 2.4l dohc ( engine type : k24a4 )
i bought today a new( used engine) but it's written ivtec 2.4l dohc sulev , but the same engine type k24a4
after search i have found that sulev = Super ultra-low emissions vehicle
and i don't know the year of the new installed engine.
will i have any problems with the already existing ecu ? should i change it ? or it works regularly
thank you

 

An SULEV will have a different PCM. It probably wouldn't run properly. If it does, youll likely get trouble codes for some emissions components(CAT, O2 etc....)