it sounds like you are talking about an entirely separate issue.
i run my Z until there are no dots of gas left just about every single tank. the car runs and drives fine.
the fuel starvation issue that this particular thread is discussing is unrelated to the calibration of the fuel level sending units and their accuracy.
we are all talking about fuel placement control inside the gas tank. when making a hard right, the gasoline shifts to the left side of the tank. the fuel pump cannot draw in the fuel momentarily until it settles and also siphons some over, so the engine starves of fuel and cuts power for a few seconds. the lower your fuel level, the more prone to this issue you become.
in some cases it can be worse. if you manage to relocate nearly every last bit of your fuel over to the left side of the tank (you could even have a gallon or two over there), the car is dead and will not run until you put more gas in it. that is because the siphon that pulls the fuel from the left side of the tank to the right side (this gas tank is divided in half by the driveshaft, shaped like saddle-bags) is a venturi that is powered by the fuel dumped out from the fuel pressure regulator inside the fuel pump sending unit. if the pump isnt pumping fuel, then the venturi dies, and there is no more siphoning action.
this can leave you stranded on the side of the road, it happened to me once. with 1/4 tank of gas according to the gauge.
no replacement sending units from nissan are going to fix this issue. this is not actually a concern of theirs. nearly all factory vehicles have this issue, in some cars it worse than others. ours is pretty bad due to some of the specifics of our fuel system layout.
but alas, i have the answer.
