what i also meant to say was that i don't know if the fiat ecu had the datastream in the chip from the factory, but cosworth's didn't. they just had a code output that could be used to flash an led to give an indication of any sensor faults like open circuit, but not any values.

the datastream only came about when pectel started it in rally cars and then chips got copied and maps altered until it became more commonplace. but there are not many people selling chips that understand how the datastream is coded.