GM MEFI-1 - read engine data

Hi,Im looking for info on how to read the data on the serial data pin on the DLC. It's a 1996 Volvo Penta 4.3 Gi and I believe it's an MEFI-1 from GM.I've found the pinout of the connector, it's only one pin (G in the 10-pin Delphi connector) and it's supposed to be 8192 baud. Does anybody know how to interprete the data coming on this pin? What's the encoding of the data? The most interesting piece of data I'm looking for is the fuel-flow (GPH). Anyone ?? Regards PeO

I *believe* there was a Tunerpro definition for MEFI around?