What actually happens via Mem-cal, without MAT Sensor i.e. Timing

[Aliens]

I have a straight-gas VN where the MAT sensor is always effectively not there to the computer (with a serial cable connected to ALDL program on laptop etc).

What actually are the effects on FUEL and IGNITION, with no sensor plugged in?

E.g. is timing higher or lower?

Obviously without even petrol lines the fuel side of the chip isn't relevant...

[delcowizzid]

it will default to a set default temp i cant remember what it goes to off my head or the timing effect i could investigate if it was important