Re the resoloution, debate.
The a/d on a cossie ecu will not be 16 bits. At most 12, but could be either 8 or 10 bit.
With a 3 bar the resoloution with 8 bit is to 0.01bar ish, with a 5bar sensor 0.02bar ish.

Resoloution is not a problem really, as all in all there are many factors that determine fueling, error between 0.02 bar (max error will be +-0.01bar) will be very low.

Darren