Super Charged Mark Vlll's in here for a question

[Roadboss]

I no longer have an accurate Fuel economy display. The only thing accurate about it is the gallons to empty reading. When I check milage the old fashion way I get 20 MPG and the display will show an average of 25+, and an instant check will be rediculous at 30+. I do have the correct gear in the transmission, and of course the chip has been programmed to them.

I truly miss having this display, and wanted to know if others have this problem and if any one has found a way to fix it.

 

[Calabrio]

Mine does something similar, but I don't have a supercharger.
The only change to my fuel system was a 255 lph fuel pump.

I have been able to find no explanation for the inaccurate readings either.

 

[brentalan]

I have the 255 pump and mine works fine - could be something else.

 

[Roadboss]

Yes, I have a SC and chip with a KB Boost a pump (BAP), these remap the fuel curve and my question relates as to anyone who may have the same condition. The fuel pump LPH has no effect on the on the subject.