Have a fuel gauge that is erratic. It will show full....the next time it will show empty...sometimes the digital readout gives miles to empty and the next time it doesn't show at all...sometimes one or the other works and the next neither work...it is a flex fuel vehicle. I've got various answers and advice...some say it is the flex fuel sensor module...another said that it definitely not the flex module but is the fuel level sensor in the gas tank....what do you think? ...ford taurus with the 3.0...sedan....eighth digit in vin is a 2...thanks, Lou