ECU codes

[GRAK]

I've just got some more bits from the scrappies for my 16v engine.
They are from a H reg 16v Calibra.
The ECU has a slightly different code on it to the one that i got from a G reg Astra gte 16v
What is the difference, i take it that both should work?

[Gander]

Did you get an ecu with your 16v engine?

[GRAK]

Yes i did, but it was on the drivers seat and not connected!
Just wondering if the chip was different in each ECU?

[Gander]

I'd use the ecu that came with the engine, There were some slight alterations to the maps over the years, the 2 most significant were (IIRC) Lambda control and after cats were fitted.