Hi, I have fitted an ATP (Magnetti Marelli) ECU to Peugeot 306 1996 2.0 RFX engine and it is not going into closed loop, even after driving it 700+ miles.
Spoken to ATP and they say that it essential that this ECU has Marelli 02 sensor as there is something specific about its operation.
Peugeot sells Bosch sensor in a Peugeot box which is what I had fitted.
So, I am having difficulty in finding a Magnetti Marelli dealer that can help with this 02 sensor, If anyone knows of one it would be much appreciated.

Thanks, Martin.