Honda won't start / cuts out at low fuel level. on 1990 Honda Civic

Honda Civic runs with a full tank (10 gal.) of gas but when the fuel level gets down to 2.5 gal. of gas remaining, the car cuts out and will not start up. When it gets close to this lower fuel level it starts to cut out at stops but will start up again.
Fuel relay + ignition checked out O.K.

Asked by for the 1990 Honda Civic
Either your gas gauge and or fuel level sending unit is defective or you have a bunch of sediment in the bottom of your tank, that floats, when there is a lot of gas in the tank.